# dottxt

**Canonical:** https://apis.io/providers/dottxt/  
**Website:** https://docs.dottxt.ai  
**APIs profiled:** 2

dottxt (styled .txt) is the company behind Outlines, the open-source structured-generation library for LLMs with 65M+ downloads. Its hosted platform API (api.dottxt.ai) is an OpenAI-compatible Chat Completions endpoint that guarantees 100% schema-compliant model output by construction using constrained decoding: pass a JSON Schema via `response_format` and the model produces exactly that shape — no retries, no validation loops, no defensive parsing. Output can be streamed as token deltas (SSE) or field-by-field as RFC 6902 JSON Patch events. dottxt also ships self-hosted, drop-in replacements for vLLM, SGLang and TensorRT-LLM inference servers, and composable libraries (dotjson for JSON Schema, dotgrammar for context-free grammars, dotlambda for function calling). Backed by EQT Ventures and Seedcamp.

## Kin Score — 30.1 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 30.1).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 14.9 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 61.3 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

## Agent readiness — 34.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (2)

- **dottxt Chat API** — OpenAI-compatible chat completions with structured output.
- **dottxt Models API** — Models available to your API key.

## MCP servers (1)

- **dottxt MCP Server**

## Agentic access (1)

- **Dottxt Agentic Access** — 2 operations · 1 acting

## Security (2)

- **Dottxt Authentication** — http · 1 scheme
- **Dottxt Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Company, Artificial Intelligence, LLM, Structured Outputs, JSON-Schema, Machine-Learning, Developer Tools, Constrained Decoding

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