# Fixie

**Canonical:** https://apis.io/providers/fixie-ai/  
**Website:** https://www.fixie.ai/  
**APIs profiled:** 1

Fixie, now operating as Ultravox, builds real‑time speech‑native voice AI platforms. The company provides developer‑friendly APIs that enable fast, natural conversational experiences, offering primitives for voice agents, pricing tiers, and extensive documentation. Backed by Redpoint Ventures, Ultravox focuses on research and product development to accelerate speech‑to‑speech AI capabilities.

## Kin Score — 20.7 / 100 (emerging)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 57.1 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 9.5 |
| Access Clarity | 63.2 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 13.7 (matched via fallback).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |

## APIs (1)

- **Fixie API** — Fixie (operating as Ultravox) offers a developer‑friendly voice AI platform, but no machine‑readable API contract was found.

## Security (1)

- **Fixie Ai Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Fixie Ai Plans Pricing**

## Tags

Company, VoiceAI, RealTime, SpeechNative, DeveloperAPI

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/fixie-ai/). Scores are computed from the provider's own public artifacts under a published rubric.