dottxt
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.
dottxt publishes 2 APIs on the APIs.io network: Chat API and Models API. Tagged areas include Company, Artificial Intelligence, LLM, Structured Outputs, and JSON Schema.
dottxt’s developer surface includes documentation, API reference, getting-started guide, signup flow, engineering blog, authentication, and 16 more developer resources.
Kin Score
APIs 2
Individual APIs this provider publishes, each with its own machine-readable definition.
dottxt Chat API
OpenAI-compatible chat completions with structured output.
dottxt Models API
Models available to your API key.
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
dottxt-mcp.yml
MCP SERVERSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API