{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"fixie-ai","slug":"fixie-ai","name":"Fixie AI","type":"agent","url":"https://www.fixie.ai","page_url":"https://unfragile.ai/fixie-ai","categories":["ai-agents"],"tags":[],"pricing":{"model":"free","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"fixie-ai__cap_0","uri":"capability://text.generation.language.speech.native.real.time.voice.processing.with.paralinguistic.preservation","name":"speech-native real-time voice processing with paralinguistic preservation","description":"Processes audio input directly through Ultravox v0.7 speech model without intermediate ASR-to-text-to-LLM pipeline, preserving tone, cadence, pitch, and other paralinguistic signals in the inference process. The model operates on raw audio features rather than transcribed text, enabling sub-600ms response times while maintaining semantic understanding of emotional and contextual vocal cues.","intents":["Build voice agents that understand emotional tone and vocal nuance without losing information in transcription","Deploy low-latency voice applications where response time under 1 second is critical","Create conversational AI that responds naturally to speech patterns, not just word content"],"best_for":["Teams building customer service voice agents with emotional intelligence requirements","Developers creating real-time voice interaction applications (call centers, voice assistants)","Builders prioritizing latency over multi-step reasoning"],"limitations":["Speech-only input modality — no text-only or mixed text/audio input documented","Optimized for real-time interaction — unclear suitability for batch audio processing","Reasoning capabilities relative to GPT-4 or Claude unknown — positioned as 'performs as well as top reasoning models when latency is factored' but no direct capability comparison provided","No documented support for audio preprocessing, noise filtering, or format conversion"],"requires":["Audio input in supported format (specific formats not documented)","API key for Ultravox platform","Network connectivity for cloud-hosted inference"],"input_types":["audio (real-time stream or file)"],"output_types":["audio (voice response)","text (optional transcription)"],"categories":["text-generation-language","voice-ai"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_1","uri":"capability://automation.workflow.bidirectional.real.time.audio.streaming.with.concurrent.call.handling","name":"bidirectional real-time audio streaming with concurrent call handling","description":"Manages full-duplex audio streams where voice input and output occur simultaneously, with infrastructure supporting configurable concurrency limits per pricing tier (5 concurrent calls on free tier, unlimited on Pro). Uses dedicated cloud infrastructure managed by Ultravox rather than shared inference pools, enabling predictable latency and resource allocation for production voice applications.","intents":["Deploy voice agents that handle multiple concurrent customer calls without degradation","Build telephony-integrated applications with guaranteed concurrency capacity","Scale voice agent infrastructure from prototype (5 concurrent) to production (unlimited)"],"best_for":["Call centers and customer service teams needing multi-concurrent voice handling","Startups prototyping voice agents with free tier (5 concurrent calls)","Enterprises requiring unlimited concurrent voice sessions"],"limitations":["Free tier hard-capped at 5 concurrent calls — not suitable for production deployments","Pay-Go tier concurrency limit not documented — unclear scaling path between free and Pro","No documented queue management, call prioritization, or overflow handling mechanisms","Latency guarantees not specified — only average response time (600ms) documented, not p99 or p95"],"requires":["Ultravox API key","Network bandwidth sufficient for bidirectional audio streaming","Pricing tier matching concurrency requirements (free: 5, Pro: unlimited)"],"input_types":["audio stream (real-time, bidirectional)"],"output_types":["audio stream (real-time, bidirectional)"],"categories":["automation-workflow","voice-infrastructure"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_2","uri":"capability://text.generation.language.integrated.text.to.speech.synthesis.with.voice.agent.responses","name":"integrated text-to-speech synthesis with voice agent responses","description":"Generates natural voice output from text or model responses using built-in TTS included in per-minute pricing. The TTS is integrated into the agent response pipeline, enabling end-to-end voice conversations without external TTS service dependencies. Specific voice options, quality tiers, or language support not documented.","intents":["Build complete voice agents that speak responses without integrating separate TTS services","Reduce latency by eliminating external TTS API calls in the response pipeline","Simplify deployment by bundling voice input and output in single platform"],"best_for":["Developers building voice agents who want unified input/output handling","Teams minimizing external dependencies and integration complexity","Applications where TTS latency must be minimized"],"limitations":["TTS quality, voice options, and language support not documented","Pricing includes TTS but no breakdown of TTS vs inference costs","No documented support for custom voices, voice cloning, or voice selection","No specification of audio output format, sample rate, or codec"],"requires":["Ultravox API key","Text or model response to synthesize"],"input_types":["text"],"output_types":["audio (synthesized speech)"],"categories":["text-generation-language","voice-synthesis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_3","uri":"capability://tool.use.integration.telephony.provider.integration.with.built.in.call.routing","name":"telephony provider integration with built-in call routing","description":"Provides native integrations with major telephony providers for inbound/outbound call handling, enabling voice agents to be deployed as phone numbers without custom telephony infrastructure. Specific supported providers not documented, but platform claims 'built-in integrations with largest telephony providers.' Integration likely handles call setup, audio routing, and call termination through provider APIs.","intents":["Deploy voice agents as callable phone numbers without building custom telephony infrastructure","Integrate voice agents into existing call center systems","Enable inbound customer calls to be handled by AI agents"],"best_for":["Call centers and customer service teams deploying AI voice agents","Businesses wanting to expose voice agents via phone numbers","Teams without telephony infrastructure expertise"],"limitations":["Specific supported telephony providers not documented — unclear which providers are supported","Call routing logic, failover handling, and call transfer capabilities not documented","No documentation of call recording, compliance with call recording laws, or audit trails","Integration setup process and configuration requirements not specified","No mention of PSTN fallback, call quality monitoring, or SLA guarantees"],"requires":["Account with supported telephony provider","Ultravox API key","Phone number provisioning (process not documented)"],"input_types":["audio (from PSTN/telephony network)"],"output_types":["audio (to PSTN/telephony network)"],"categories":["tool-use-integration","telephony"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_4","uri":"capability://tool.use.integration.rest.api.with.developer.sdks.for.multi.platform.integration","name":"rest api with developer sdks for multi-platform integration","description":"Exposes REST API endpoints for programmatic agent control and integration, with SDKs available for 'every major platform across web + mobile' (specific languages/platforms not documented). Enables developers to build custom applications, dashboards, and integrations on top of Ultravox voice agents without direct API calls.","intents":["Integrate voice agents into custom applications and dashboards","Build web and mobile frontends for voice agent interactions","Automate agent management and monitoring via API"],"best_for":["Developers building custom applications around voice agents","Teams needing web/mobile interfaces for voice agent control","Builders integrating Ultravox into existing platforms"],"limitations":["Specific SDK languages and platforms not documented — unclear which platforms are supported","API endpoint specifications, request/response formats, and authentication mechanism not provided","Rate limiting, quota management, and error handling not documented","No documentation of webhook support, polling intervals, or real-time event streaming","SDK maturity, maintenance status, and version compatibility not specified"],"requires":["Ultravox API key","Supported SDK language/platform (not specified)","Network connectivity to Ultravox cloud infrastructure"],"input_types":["JSON (API requests)"],"output_types":["JSON (API responses)"],"categories":["tool-use-integration","developer-tools"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_5","uri":"capability://automation.workflow.per.minute.usage.based.pricing.with.transparent.cost.model","name":"per-minute usage-based pricing with transparent cost model","description":"Charges for voice agent usage based on conversation duration (per-minute) rather than per-call or per-token, with pricing including both inference and TTS costs. Free tier offers 5 concurrent calls at $0.05/minute; Pro tier ($100/month billed yearly) provides unlimited concurrency. Pricing model is transparent and predictable, enabling cost forecasting based on conversation duration.","intents":["Forecast voice agent costs based on expected conversation duration","Choose pricing tier matching concurrency requirements and budget","Avoid surprise costs from token-based or per-call pricing models"],"best_for":["Startups and small teams prototyping voice agents with limited budget (free tier)","Enterprises with predictable conversation volumes needing cost certainty","Teams comparing cost models across voice AI platforms"],"limitations":["Free tier limited to 5 concurrent calls — not suitable for production","Pay-Go tier pricing and concurrency limits not documented — unclear cost/concurrency tradeoff","No per-minute pricing breakdown between inference and TTS","No volume discounts or enterprise pricing documented","Minimum conversation duration or billing granularity not specified (e.g., billed per second or per minute?)","No cost optimization features documented (e.g., caching, request batching)"],"requires":["Ultravox account","Payment method for Pro tier or Pay-Go usage"],"input_types":[],"output_types":[],"categories":["automation-workflow","pricing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_6","uri":"capability://automation.workflow.cloud.hosted.dedicated.infrastructure.with.no.external.llm.dependencies","name":"cloud-hosted dedicated infrastructure with no external llm dependencies","description":"Runs Ultravox v0.7 speech model on dedicated cloud infrastructure managed by Ultravox, eliminating dependency on external LLM APIs (OpenAI, Anthropic, Google) and shared inference pools. Enables predictable latency (~600ms response time) and guaranteed availability without contention from other users. Infrastructure is purpose-built for speech processing rather than general-purpose LLM inference.","intents":["Deploy voice agents with guaranteed latency and availability","Avoid latency variance from shared LLM inference pools","Build voice applications without external LLM API dependencies"],"best_for":["Production voice applications requiring predictable latency","Teams wanting to avoid external LLM API dependencies and costs","Enterprises with strict availability and performance requirements"],"limitations":["No model selection or customization — locked to Ultravox v0.7","No local deployment option — cloud-only platform","Latency guarantees not specified — only average response time (600ms) documented, not SLA or p99","No documented disaster recovery, failover, or multi-region deployment","Infrastructure capacity limits not documented — unclear how platform scales with demand","No option to use alternative models (GPT-4, Claude, Gemini) if needed"],"requires":["Ultravox API key","Network connectivity to Ultravox cloud infrastructure","Acceptance of cloud-only deployment model"],"input_types":[],"output_types":[],"categories":["automation-workflow","infrastructure"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_7","uri":"capability://memory.knowledge.multi.turn.conversation.context.management.with.session.persistence","name":"multi-turn conversation context management with session persistence","description":"Maintains conversation state across multiple turns of interaction, enabling agents to reference previous messages and build context over time. Implementation details (context window size, session storage, memory limits) not documented, but platform positions itself as handling 'complex interactions' with context preservation.","intents":["Build voice agents that remember previous conversation context","Enable multi-turn conversations where agent references earlier statements","Maintain conversation history for analytics and compliance"],"best_for":["Customer service agents handling multi-turn support conversations","Voice applications requiring contextual understanding across turns","Teams needing conversation history for compliance or analytics"],"limitations":["Context window size not documented — unclear how many turns or tokens are retained","Session persistence mechanism not documented — unclear if context survives platform restarts","No documented context pruning or summarization for long conversations","Memory limits not specified — unclear behavior when context exceeds capacity","No documented support for context injection, user profiles, or external context sources"],"requires":["Ultravox API key","Session identifier or conversation ID (format not documented)"],"input_types":["audio (multi-turn)"],"output_types":["audio (contextual response)"],"categories":["memory-knowledge","conversation-management"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_8","uri":"capability://text.generation.language.voice.agent.customization.via.natural.language.configuration","name":"voice agent customization via natural language configuration","description":"Enables developers to define agent behavior, personality, and capabilities using natural language instructions rather than code or configuration files. Specific customization options (system prompts, behavior constraints, knowledge injection) not documented, but platform positions itself as 'natural language' first.","intents":["Configure voice agent behavior without writing code","Define agent personality and communication style","Customize agent responses for specific use cases"],"best_for":["Non-technical users configuring voice agents","Teams rapidly iterating on agent behavior","Builders wanting quick customization without code deployment"],"limitations":["Customization options and constraints not documented — unclear what can be configured","No documentation of system prompt injection, prompt engineering, or advanced customization","No version control or rollback mechanism documented","No A/B testing or experimentation framework documented","Unclear how natural language instructions are translated to agent behavior"],"requires":["Ultravox account","Natural language description of desired agent behavior"],"input_types":["text (natural language instructions)"],"output_types":["agent configuration (format not documented)"],"categories":["text-generation-language","configuration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__cap_9","uri":"capability://planning.reasoning.performance.benchmarking.against.competing.voice.ai.models","name":"performance benchmarking against competing voice ai models","description":"Provides Big Bench Audio Score benchmarks comparing Ultravox v0.7 against GPT-4 Realtime, Gemini Live, and Claude Sonnet 4.5 across response quality and latency metrics. Ultravox v0.7 scores ~2760 with ~600ms response time vs competitors' 1200-2400ms, positioning it as 'performs as well as top reasoning models when latency is factored.'","intents":["Compare Ultravox performance against competing voice AI platforms","Evaluate latency/quality tradeoffs for voice agent selection","Benchmark voice AI models for production deployment decisions"],"best_for":["Teams evaluating voice AI platforms for production deployment","Builders comparing latency and quality across options","Enterprises making platform selection decisions"],"limitations":["Benchmark methodology not documented — unclear how scores are calculated or what tasks are tested","Big Bench Audio Score not independently verified — only Ultravox's published numbers available","Benchmark may not reflect real-world use cases — unclear if test scenarios match production workloads","No benchmark data for other competitors (Twilio, Vonage, custom solutions)","Latency benchmarks don't account for network latency, audio encoding/decoding, or end-to-end system latency"],"requires":["Access to published benchmark data (available on website)"],"input_types":[],"output_types":["benchmark scores (Big Bench Audio Score)"],"categories":["planning-reasoning","benchmarking"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"fixie-ai__headline","uri":"capability://tool.use.integration.conversational.ai.agent.platform","name":"conversational ai agent platform","description":"A platform for building and deploying conversational AI agents that seamlessly integrate with external services and manage complex interactions using natural language.","intents":["best conversational AI platform","conversational AI for customer service","top tools for building AI agents","AI agent solutions for multi-step workflows","deploying conversational agents in real-time"],"best_for":["developers building AI agents","businesses automating customer interactions"],"limitations":[],"requires":[],"input_types":[],"output_types":[],"categories":["tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":58,"verified":false,"data_access_risk":"high","permissions":["Audio input in supported format (specific formats not documented)","API key for Ultravox platform","Network connectivity for cloud-hosted inference","Ultravox API key","Network bandwidth sufficient for bidirectional audio streaming","Pricing tier matching concurrency requirements (free: 5, Pro: unlimited)","Text or model response to synthesize","Account with supported telephony provider","Phone number provisioning (process not documented)","Supported SDK language/platform (not specified)"],"failure_modes":["Speech-only input modality — no text-only or mixed text/audio input documented","Optimized for real-time interaction — unclear suitability for batch audio processing","Reasoning capabilities relative to GPT-4 or Claude unknown — positioned as 'performs as well as top reasoning models when latency is factored' but no direct capability comparison provided","No documented support for audio preprocessing, noise filtering, or format conversion","Free tier hard-capped at 5 concurrent calls — not suitable for production deployments","Pay-Go tier concurrency limit not documented — unclear scaling path between free and Pro","No documented queue management, call prioritization, or overflow handling mechanisms","Latency guarantees not specified — only average response time (600ms) documented, not p99 or p95","TTS quality, voice options, and language support not documented","Pricing includes TTS but no breakdown of TTS vs inference costs","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.7,"quality":0.9,"ecosystem":0.15000000000000002,"match_graph":0.25,"freshness":0.75,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.1,"match_graph":0.28,"freshness":0.12}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:21.548Z","last_scraped_at":null,"last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=fixie-ai","compare_url":"https://unfragile.ai/compare?artifact=fixie-ai"}},"signature":"e5vuRjNTO2GLrE2cZxz45CMmABxIyMlmkM3VExMqQ8Dmh3QNPzR2LY1lGoNKjQJo5hNnl2ZT7muV9iOyCjLsBA==","signedAt":"2026-06-21T06:25:11.060Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/fixie-ai","artifact":"https://unfragile.ai/fixie-ai","verify":"https://unfragile.ai/api/v1/verify?slug=fixie-ai","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}