{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"k6","slug":"k6","name":"k6","type":"repo","url":"https://github.com/grafana/k6","page_url":"https://unfragile.ai/k6","categories":["testing-quality"],"tags":[],"pricing":{"model":"free","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"k6__cap_0","uri":"capability://code.generation.editing.javascript.based.load.test.scripting.with.sobek.runtime","name":"javascript-based load test scripting with sobek runtime","description":"k6 embeds Sobek (a Go-based JavaScript runtime forked from Goja) to execute test scripts written in JavaScript, compiling them to bytecode and executing within isolated virtual user contexts. This approach combines Go's performance characteristics with JavaScript's expressiveness, enabling developers to write load tests as version-controlled code that integrates into CI/CD pipelines without requiring a separate Node.js runtime.","intents":["Write load test scripts in familiar JavaScript syntax without learning a domain-specific language","Version control test scripts alongside application code in the same repository","Execute load tests in CI/CD pipelines without Node.js dependencies","Modularize and reuse test logic across multiple test scenarios"],"best_for":["JavaScript-familiar developers building performance test suites","Teams wanting tests-as-code integrated into CI/CD without polyglot runtimes","Organizations migrating from JMeter or LoadRunner to code-driven testing"],"limitations":["Sobek runtime has subtle differences from V8 — some ES6+ features may behave differently than browser JavaScript","No async/await support in early versions; requires promise-based or callback patterns","Single-threaded per VU — CPU-intensive test logic can become a bottleneck at high concurrency"],"requires":["k6 binary (v0.25.0+)","JavaScript test script (.js file)","No external Node.js runtime required"],"input_types":["JavaScript source code","ES6 modules with import/export"],"output_types":["Compiled bytecode (internal)","Execution results (metrics, logs)"],"categories":["code-generation-editing","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_1","uri":"capability://automation.workflow.multi.protocol.load.testing.with.protocol.specific.modules","name":"multi-protocol load testing with protocol-specific modules","description":"k6 provides native modules for HTTP, WebSocket, gRPC, and browser automation (via Chromium), each implementing protocol-specific request/response handling, connection pooling, and metrics collection. The module architecture uses a registry pattern where each protocol module implements a common interface, allowing developers to mix protocols within a single test script and share metrics across them.","intents":["Test REST APIs, GraphQL endpoints, and WebSocket connections in a single load test","Simulate gRPC service load with proper connection multiplexing and streaming semantics","Test browser-based workflows and single-page applications under load","Measure protocol-specific metrics (HTTP status codes, WebSocket frame latency, gRPC error rates)"],"best_for":["API teams testing microservices that use mixed protocols (REST + gRPC + WebSocket)","Frontend teams validating SPA performance under concurrent user load","Platform engineers stress-testing infrastructure supporting multiple protocol stacks"],"limitations":["Browser module (k6/browser) requires Chromium binary and adds ~500MB+ overhead per test run","gRPC module requires .proto definitions to be compiled into test scripts; no runtime proto reflection","WebSocket module does not support binary frames or custom subprotocols beyond basic text/binary","HTTP/2 Server Push is not fully supported; HTTP/2 connection reuse works but with limitations"],"requires":["k6 binary with protocol modules compiled in (standard distribution includes HTTP, WebSocket, gRPC)","For browser testing: Chromium binary (k6 can auto-download via --browser-type=chromium)","For gRPC: protoc compiler to generate .proto stubs"],"input_types":["HTTP URLs, request bodies (JSON, form-encoded, binary)","WebSocket URLs and message payloads","gRPC service definitions (.proto files)","Browser automation scripts (Playwright-like API)"],"output_types":["Protocol-specific metrics (status codes, latency, error rates)","Connection statistics (open connections, reused connections)","Browser performance metrics (page load time, DOM metrics)"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_10","uri":"capability://automation.workflow.distributed.load.testing.with.cloud.execution.and.result.aggregation","name":"distributed load testing with cloud execution and result aggregation","description":"k6 Cloud (Grafana's managed service) enables distributed load testing by uploading test scripts and orchestrating execution across multiple cloud regions. The cloud backend aggregates metrics from all regions, provides real-time dashboards, and stores results for historical comparison. Local k6 instances can also be coordinated via the Control API for on-premises distributed testing.","intents":["Simulate load from multiple geographic regions to test global CDN and edge infrastructure","Scale load beyond a single machine's capacity by distributing VUs across cloud instances","Visualize real-time metrics across all regions in a unified dashboard","Archive test results for compliance and historical trend analysis"],"best_for":["Teams testing global infrastructure with geographic distribution requirements","Organizations needing to scale beyond single-machine limits (>10k concurrent VUs)","Enterprise teams with compliance requirements for result archival and audit trails"],"limitations":["k6 Cloud requires a paid subscription — free tier has limited execution time and VU capacity","Distributed testing adds latency to metric aggregation — real-time dashboards may lag by 10-30 seconds","On-premises distributed testing via Control API requires manual orchestration — no built-in load balancing or failover","Results are stored in k6 Cloud — exporting historical data requires API calls or manual downloads"],"requires":["k6 binary (v0.25.0+)","k6 Cloud account and API token (for cloud execution)","Test script compatible with cloud execution (no local file imports, no custom extensions)"],"input_types":["Test script (.js file)","Cloud configuration (region, VU distribution, duration)","API token for authentication"],"output_types":["Aggregated metrics across regions","Real-time dashboard (k6 Cloud UI)","Test result archive (JSON, CSV export)"],"categories":["automation-workflow","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_11","uri":"capability://data.processing.analysis.html.parsing.and.dom.like.querying.with.css.selectors","name":"html parsing and dom-like querying with css selectors","description":"k6's k6/html module provides a Response.html() method that parses HTML responses and returns a Selection object supporting jQuery-like CSS selector queries. Developers can extract data from HTML (links, form fields, text content) using familiar selector syntax without manual regex or string parsing. This enables testing of server-rendered applications and web scraping scenarios within load tests.","intents":["Extract links, form fields, and hidden tokens from HTML responses for subsequent requests","Validate HTML structure and content (presence of elements, text content) without regex","Test server-rendered applications by following links and submitting forms","Simulate realistic browser workflows (login forms, multi-step flows) with HTML parsing"],"best_for":["QA teams testing server-rendered web applications (traditional MVC, server-side rendering)","Teams migrating from Selenium or Cypress to load testing with HTML parsing","Developers building realistic user journey tests with form submission and link following"],"limitations":["HTML parsing is synchronous and blocks test execution — large HTML documents (>10MB) can cause latency spikes","CSS selector support is limited to basic selectors (element, class, ID, attribute) — no pseudo-selectors or complex combinators","No JavaScript execution — dynamic content rendered by JavaScript is not available","No form auto-submission — developers must manually extract form fields and submit"],"requires":["k6 binary (v0.25.0+)","Test script importing k6/html module","HTTP response with HTML content"],"input_types":["HTML response body (string)","CSS selectors (string)"],"output_types":["Selection object (jQuery-like interface)","Extracted text, attributes, or HTML content"],"categories":["data-processing-analysis","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_12","uri":"capability://automation.workflow.websocket.connection.management.with.message.framing.and.event.handling","name":"websocket connection management with message framing and event handling","description":"k6's k6/ws module provides WebSocket client functionality with methods for connecting, sending/receiving messages, and handling connection events. The module supports text and binary frames, automatic reconnection, and event listeners (open, message, close, error). Metrics are collected for connection latency, message throughput, and error rates, enabling load testing of real-time services.","intents":["Load test WebSocket servers with concurrent connections and message throughput","Simulate real-time user interactions (chat, notifications, live updates) under load","Measure WebSocket connection latency and message delivery time","Test WebSocket error handling and reconnection behavior"],"best_for":["Teams testing real-time services (chat, notifications, live dashboards)","Platform engineers validating WebSocket server capacity and connection limits","QA teams measuring message latency and throughput under concurrent load"],"limitations":["WebSocket module does not support binary frames beyond basic byte arrays — no support for custom serialization formats","No built-in message ordering or delivery guarantees — developers must implement custom acknowledgment logic","Reconnection is automatic but not configurable — no support for exponential backoff or custom retry logic","No support for WebSocket subprotocols or custom headers beyond basic HTTP upgrade"],"requires":["k6 binary (v0.25.0+)","Test script importing k6/ws module","WebSocket server endpoint (ws:// or wss://)"],"input_types":["WebSocket URL (string)","Message payload (text or binary)","Connection options (headers, timeout)"],"output_types":["WebSocket connection object","Received messages (text or binary)","Connection metrics (latency, message throughput)"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_13","uri":"capability://automation.workflow.grpc.service.load.testing.with.streaming.and.unary.call.support","name":"grpc service load testing with streaming and unary call support","description":"k6's k6/net/grpc module provides gRPC client functionality for unary calls, server streaming, client streaming, and bidirectional streaming. The module requires .proto definitions to be compiled into the test script and supports metadata, authentication, and custom interceptors. Metrics are collected for call latency, error rates, and streaming throughput, enabling load testing of gRPC microservices.","intents":["Load test gRPC services with unary and streaming calls","Measure gRPC call latency and error rates under concurrent load","Test gRPC authentication (mTLS, token-based) and authorization","Simulate realistic gRPC client behavior (streaming, long-lived connections)"],"best_for":["Microservices teams testing gRPC APIs under load","Platform engineers validating gRPC server capacity and connection limits","QA teams measuring gRPC call latency and streaming throughput"],"limitations":["gRPC module requires .proto definitions to be compiled into test scripts — no runtime proto reflection","Streaming calls require manual message handling — no built-in message batching or buffering","No support for gRPC reflection API — services must expose .proto files","Metadata and authentication are manual — no built-in support for common patterns (JWT, OAuth)"],"requires":["k6 binary (v0.25.0+)","Test script importing k6/net/grpc module","gRPC service .proto definitions compiled into test script","gRPC server endpoint (host:port)"],"input_types":["gRPC service definition (.proto file)","Request message (protobuf message object)","Metadata and authentication options"],"output_types":["gRPC response message","Call metrics (latency, error rates)","Streaming message throughput"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_14","uri":"capability://automation.workflow.environment.variable.and.command.line.parameter.injection","name":"environment variable and command-line parameter injection","description":"k6 supports parameterizing test scripts via environment variables and command-line flags, enabling test configuration without modifying script code. Environment variables are accessed via __ENV object in test scripts; command-line parameters are passed via --env flag (e.g., --env BASE_URL=https://api.example.com). This enables CI/CD integration where test parameters (API endpoint, load profile, credentials) are injected at runtime without script changes.","intents":["Configure test parameters (API endpoint, credentials, load profile) without modifying script code","Run the same test script against different environments (dev, staging, production)","Integrate load tests into CI/CD pipelines with dynamic parameter injection","Support multiple test configurations from a single script"],"best_for":["CI/CD integration with dynamic test configuration","Multi-environment testing (dev, staging, production)","Teams wanting to avoid script duplication for different configurations"],"limitations":["Environment variables are strings; no type conversion (numbers, booleans must be parsed manually)","No validation of required environment variables; missing variables cause runtime errors","Environment variables are global; no per-VU environment variable overrides","Command-line parameter parsing is simple; no support for complex configuration formats (YAML, TOML)"],"requires":["k6 v0.25.0+","Environment variables set in shell or CI/CD platform","Test script accessing __ENV object"],"input_types":["Environment variables: KEY=VALUE format","Command-line flags: --env KEY=VALUE","Shell environment: inherited from parent process"],"output_types":["Injected values: accessible via __ENV.KEY in test script","Test configuration: applied to all VUs and scenarios"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_2","uri":"capability://automation.workflow.virtual.user.lifecycle.management.with.setup.teardown.hooks","name":"virtual user lifecycle management with setup/teardown hooks","description":"k6 manages virtual user (VU) instances through a lifecycle model where each VU executes setup code once, then runs a main test function repeatedly for a configured duration or iteration count, and finally executes teardown code. The Runner interface orchestrates VU creation, scheduling, and cleanup, with the Control API allowing runtime manipulation of VU count and execution state through REST endpoints.","intents":["Initialize per-VU state (authentication tokens, session IDs) before load test execution","Simulate realistic user workflows with repeated actions and state persistence across iterations","Clean up resources (close connections, delete test data) after load test completion","Dynamically scale VU count up/down during test execution based on real-time metrics"],"best_for":["Teams testing stateful services requiring per-user authentication and session management","Load tests simulating realistic user journeys with setup/teardown phases","CI/CD pipelines needing programmatic control over test execution (scaling, pausing, stopping)"],"limitations":["VU state is not shared across VUs — each VU has isolated memory; cross-VU communication requires external storage (Redis, database)","Setup/teardown code runs sequentially per VU, not in parallel — high VU counts can add significant setup overhead","No built-in VU affinity or sticky sessions — each iteration may route to different backend instances","Control API requires explicit --address flag to enable; disabled by default for security"],"requires":["k6 binary (v0.25.0+)","Test script with export.setup(), export.default(), export.teardown() functions","For Control API: k6 run --address=0.0.0.0:6565 flag"],"input_types":["JavaScript functions (setup, default, teardown)","Configuration options (vus, duration, iterations)","REST API calls to Control API (POST /v1/status, PATCH /v1/status)"],"output_types":["VU execution logs","Metrics (iterations, errors, duration)","Control API responses (current VU count, execution status)"],"categories":["automation-workflow","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_3","uri":"capability://automation.workflow.declarative.load.profile.configuration.with.execution.executors","name":"declarative load profile configuration with execution executors","description":"k6 uses an executor-based system where load patterns (constant VU, ramping VU, stages, arrival rate) are defined declaratively in test options or via CLI flags. Each executor implements a scheduling strategy that determines how VUs are spawned, ramped, or maintained over time. The Execution Engine reads executor configurations and orchestrates VU lifecycle according to the specified pattern, supporting complex multi-stage scenarios without code changes.","intents":["Define load ramp-up, steady-state, and ramp-down phases declaratively without modifying test code","Simulate realistic user arrival patterns (constant rate, increasing rate, spike patterns)","Run multiple concurrent scenarios with different load profiles in a single test execution","Configure load patterns via CLI flags for CI/CD integration without editing test scripts"],"best_for":["QA teams designing realistic load scenarios (ramp-up, soak, spike testing)","Platform teams validating auto-scaling policies under various load patterns","DevOps engineers integrating load tests into CI/CD with parameterized load profiles"],"limitations":["Executor scheduling is deterministic and time-based — cannot dynamically adjust based on real-time metrics (e.g., scale down if error rate exceeds threshold)","Arrival-rate executor (constant-arrival-rate) has a maximum throughput limit based on VU count and iteration duration","Stage executor requires pre-defined durations — cannot extend stages based on convergence or stability metrics","No built-in support for probabilistic load patterns or Poisson-distributed arrivals"],"requires":["k6 binary (v0.25.0+)","Test script with export.options object or CLI flags (--vus, --duration, --stage)","For complex scenarios: understanding of executor types (constant-vus, ramping-vus, stages, constant-arrival-rate, per-vu-iterations, shared-iterations)"],"input_types":["JavaScript options object (export.options = { executor: 'ramping-vus', ... })","CLI flags (--vus, --duration, --stage)","JSON configuration files (via --config flag)"],"output_types":["Execution plan (VU schedule over time)","Metrics (iterations per second, VU count over time)","Execution summary (total iterations, errors, duration)"],"categories":["automation-workflow","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_4","uri":"capability://data.processing.analysis.real.time.metrics.collection.and.threshold.based.pass.fail.evaluation","name":"real-time metrics collection and threshold-based pass/fail evaluation","description":"k6 collects metrics during test execution (HTTP latency, error rates, custom metrics) and evaluates them against configurable thresholds at test completion. Metrics are aggregated by default (p95, p99 latencies) and can be tagged for fine-grained filtering. The threshold system supports expressions (e.g., 'p95 < 500') that determine test success/failure, enabling automated performance regression detection in CI/CD pipelines.","intents":["Measure API response latency (p50, p95, p99) and error rates during load test execution","Define performance SLOs (e.g., 'p95 latency < 500ms') and fail tests if thresholds are breached","Track custom metrics (business logic events, cache hits, database query counts) alongside standard metrics","Correlate metrics with load patterns to identify performance degradation under specific conditions"],"best_for":["Teams enforcing performance SLOs in CI/CD pipelines with automated pass/fail gates","Platform engineers tracking performance regressions across releases","API teams measuring and optimizing endpoint latency under realistic load"],"limitations":["Thresholds are evaluated at test completion, not in real-time — cannot trigger dynamic scaling or test abort based on live metrics","Metric aggregation is fixed (p95, p99, min, max, avg) — custom percentiles require external post-processing","No built-in anomaly detection — thresholds are static values, not adaptive baselines","Metrics are not persisted by default — require explicit output backend (Prometheus, InfluxDB, Grafana Cloud) for historical tracking"],"requires":["k6 binary (v0.25.0+)","Test script with export.options.thresholds object","Optional: output backend configuration (--out influxdb, --out prometheus, --out cloud)"],"input_types":["Metric names and threshold expressions (e.g., 'http_req_duration{staticAsset:true} < 200')","Custom metric definitions (Counter, Gauge, Trend, Rate)","Output backend credentials (InfluxDB URL, Prometheus endpoint)"],"output_types":["Aggregated metrics (p95, p99, min, max, avg latency)","Threshold evaluation results (pass/fail per threshold)","Test summary (total requests, errors, duration)","Time-series data (if output backend configured)"],"categories":["data-processing-analysis","safety-moderation"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_5","uri":"capability://tool.use.integration.http.request.building.and.response.assertion.with.chainable.api","name":"http request building and response assertion with chainable api","description":"k6's HTTP module provides a chainable API (http.get(), http.post(), http.batch()) for constructing requests with headers, body, cookies, and TLS configuration. Responses are parsed into Response objects with properties for status, body, headers, and timings. The API supports response assertions (check() function) that validate status codes, body content, and custom conditions, with failures recorded as metrics without halting test execution.","intents":["Build HTTP requests with custom headers, authentication, and request bodies without manual string concatenation","Validate API responses (status code, JSON structure, header values) and track assertion failures as metrics","Extract data from responses (JSON parsing, regex matching) for use in subsequent requests","Measure HTTP-specific metrics (time-to-first-byte, DNS lookup time, TLS handshake time)"],"best_for":["API teams testing REST endpoints with complex request/response validation","Teams migrating from Postman or Insomnia to code-driven API testing","QA engineers building data-driven tests with response extraction and chaining"],"limitations":["Response body is loaded entirely into memory — large responses (>100MB) can cause memory issues","No built-in HTML parsing beyond basic regex — use k6/html module for DOM-like queries","Assertions (check()) do not halt test execution on failure — failures are recorded as metrics, not exceptions","Cookie handling is automatic but limited — no support for custom cookie attributes or SameSite enforcement"],"requires":["k6 binary (v0.25.0+)","Test script importing k6/http module","Target API endpoint (HTTP/HTTPS)"],"input_types":["HTTP method (GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS)","URL string or object with query parameters","Request body (string, JSON object, form data)","Headers object, cookies, TLS configuration"],"output_types":["Response object (status, body, headers, timings)","Assertion results (pass/fail per check)","HTTP metrics (latency, status code distribution, error rates)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_6","uri":"capability://code.generation.editing.module.resolution.and.es6.import.export.with.local.file.and.remote.url.support","name":"module resolution and es6 import/export with local file and remote url support","description":"k6 implements a custom module resolver that supports ES6 import/export syntax, allowing test scripts to import modules from local files (relative paths), npm-style packages (k6/* built-ins), and remote URLs (https://example.com/module.js). The resolver uses Sobek's module system to compile and cache modules, enabling code reuse and modularization without requiring npm or a build step.","intents":["Organize test code into reusable modules (helpers, fixtures, custom libraries) without npm dependencies","Import shared test utilities from remote URLs for cross-team collaboration","Use k6 built-in modules (k6/http, k6/ws, k6/encoding) without explicit installation","Version control test libraries alongside test scripts in the same repository"],"best_for":["Teams building modular test suites with shared utilities and fixtures","Organizations sharing test libraries across projects via remote URLs","Developers familiar with ES6 modules wanting familiar import/export syntax"],"limitations":["Remote module imports require network access and add latency to test startup — no caching across runs","No npm package manager integration — cannot use npm packages directly; must use k6 extensions (xk6) for custom modules","Circular imports are not supported — module dependency graph must be acyclic","Module resolution is case-sensitive on all platforms — Windows developers must use lowercase paths"],"requires":["k6 binary (v0.25.0+)","Test script with import statements","For remote modules: network access to remote URL"],"input_types":["JavaScript files (.js) with export statements","ES6 import paths (relative, k6/*, https://)"],"output_types":["Compiled module bytecode (internal)","Exported functions, objects, and constants"],"categories":["code-generation-editing","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_7","uri":"capability://data.processing.analysis.custom.metrics.definition.and.aggregation.with.tags.and.thresholds","name":"custom metrics definition and aggregation with tags and thresholds","description":"k6 provides Counter, Gauge, Trend, and Rate metric types that developers can instantiate and update within test scripts. Metrics support tags (key-value pairs) for dimensional filtering and can be aggregated by tag values. The metrics system integrates with the threshold evaluation engine, allowing custom metrics to be included in pass/fail criteria and exported to external backends.","intents":["Track business-logic metrics (login attempts, cart additions, payment failures) alongside standard HTTP metrics","Measure custom latencies (database query time, cache hit rate) and correlate with load patterns","Aggregate metrics by tag (e.g., endpoint, user_type, region) for fine-grained analysis","Define SLOs for custom metrics (e.g., 'login_success_rate > 99%') and enforce them in CI/CD"],"best_for":["Teams measuring business KPIs (conversion rate, transaction success) during load tests","Platform engineers tracking resource-specific metrics (cache hit rate, queue depth) under load","QA teams correlating application-level metrics with infrastructure metrics"],"limitations":["Custom metrics are not persisted by default — require explicit output backend configuration","Metric aggregation is fixed (min, max, avg, p95, p99) — custom aggregations require external post-processing","Tags are not indexed — high-cardinality tags (user IDs, request IDs) can cause memory bloat","No built-in metric sampling — all metric updates are recorded, which can impact performance at high throughput"],"requires":["k6 binary (v0.25.0+)","Test script importing k6/metrics module","Metric type instantiation (new Counter(), new Gauge(), new Trend(), new Rate())"],"input_types":["Metric type (Counter, Gauge, Trend, Rate)","Metric name and options (tags, unit)","Metric values (numbers)"],"output_types":["Aggregated metric values (min, max, avg, p95, p99)","Tagged metric breakdowns","Threshold evaluation results"],"categories":["data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_8","uri":"capability://safety.moderation.tls.ssl.configuration.with.certificate.pinning.and.custom.ca.support","name":"tls/ssl configuration with certificate pinning and custom ca support","description":"k6's HTTP module allows per-request TLS configuration including custom CA certificates, client certificates, and certificate pinning. The configuration is applied at the transport layer (Go's tls.Config) and supports hostname verification control, cipher suite selection, and minimum TLS version enforcement. This enables testing of services with self-signed certificates, mTLS requirements, and certificate pinning policies.","intents":["Test APIs protected by self-signed or internal CA certificates without disabling verification","Validate mTLS (mutual TLS) authentication with client certificates","Verify certificate pinning policies by testing with pinned and unpinned certificates","Test TLS version enforcement and cipher suite compatibility"],"best_for":["Security teams validating TLS configuration and certificate pinning under load","Teams testing internal APIs with self-signed certificates","Platform engineers verifying mTLS enforcement in service meshes"],"limitations":["Certificate pinning is implemented via custom CA verification, not HPKP headers — requires manual certificate management","No support for OCSP stapling or CRL checking — certificate revocation must be managed externally","TLS session resumption is handled by Go's tls.Config — limited control over session ticket lifetime","No support for client certificate rotation during test execution — certificates are fixed for the test duration"],"requires":["k6 binary (v0.25.0+)","Test script with http.request() or http.get() calls","TLS certificate files (PEM format) for custom CA or client certificates"],"input_types":["Custom CA certificate (PEM format)","Client certificate and key (PEM format)","TLS configuration options (insecureSkipVerify, minVersion, ciphers)"],"output_types":["TLS handshake metrics (TLS time, certificate validation time)","HTTP response (after successful TLS negotiation)"],"categories":["safety-moderation","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__cap_9","uri":"capability://automation.workflow.output.backend.integration.with.multiple.sink.support","name":"output backend integration with multiple sink support","description":"k6 supports multiple output backends (InfluxDB, Prometheus, Grafana Cloud, JSON, CSV) that receive metrics in real-time during test execution. The output system uses a plugin architecture where each backend implements a Collector interface that receives metric samples. Backends can be configured via CLI flags or environment variables, enabling metrics to be streamed to monitoring systems without code changes.","intents":["Stream metrics to InfluxDB or Prometheus for real-time visualization during test execution","Export test results to JSON or CSV for post-test analysis and reporting","Integrate k6 metrics with existing monitoring dashboards (Grafana, Datadog)","Archive test results for historical comparison and trend analysis"],"best_for":["Teams with existing Prometheus or InfluxDB infrastructure wanting to integrate k6 metrics","DevOps engineers building dashboards for load test monitoring","QA teams generating test reports for stakeholder review"],"limitations":["Output backends are not multiplexed by default — only one backend per test run (use --out multiple times for multiple backends in recent versions)","InfluxDB backend requires network access and authentication — failures are logged but do not halt test execution","JSON output includes all metric samples, resulting in large files for long tests (>1GB for 1-hour tests)","Prometheus output requires a scrape endpoint — k6 does not expose a Prometheus server, only writes to remote_write"],"requires":["k6 binary (v0.25.0+)","Output backend configuration (--out influxdb=http://localhost:8086/k6, --out prometheus=http://localhost:9090)","Optional: output backend credentials (environment variables or CLI flags)"],"input_types":["Output backend type and configuration (URL, credentials, database name)","Metric samples (name, value, tags, timestamp)"],"output_types":["Time-series data (InfluxDB, Prometheus)","JSON or CSV files","Grafana Cloud metrics"],"categories":["automation-workflow","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"k6__headline","uri":"capability://testing.quality.developer.centric.load.testing.tool","name":"developer-centric load testing tool","description":"k6 is a modern, open-source load testing tool designed for developers, allowing them to write performance tests in JavaScript and execute them easily in CI/CD pipelines, making load testing as intuitive as writing unit tests.","intents":["best load testing tool","load testing for APIs","open-source load testing solutions","load testing tools for developers","how to perform load testing with JavaScript"],"best_for":["developers","QA engineers"],"limitations":[],"requires":[],"input_types":["JavaScript test scripts"],"output_types":["performance metrics","test results"],"categories":["testing-quality"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":56,"verified":false,"data_access_risk":"high","permissions":["k6 binary (v0.25.0+)","JavaScript test script (.js file)","No external Node.js runtime required","k6 binary with protocol modules compiled in (standard distribution includes HTTP, WebSocket, gRPC)","For browser testing: Chromium binary (k6 can auto-download via --browser-type=chromium)","For gRPC: protoc compiler to generate .proto stubs","k6 Cloud account and API token (for cloud execution)","Test script compatible with cloud execution (no local file imports, no custom extensions)","Test script importing k6/html module","HTTP response with HTML content"],"failure_modes":["Sobek runtime has subtle differences from V8 — some ES6+ features may behave differently than browser JavaScript","No async/await support in early versions; 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