Discovery is how a developer finds their way into 📝MythOS MCP — a static index at llms.txt, an OpenAPI spec, and an agent-plugin manifest that together describe the platform's API without requiring a key first. It exists so building an integration starts with reading docs, not reverse-engineering requests. It's for anyone evaluating or building against the 📝Internal Agent API before they've generated a key.

Key Capabilities

• llms.txt — a static, unauthenticated index describing the platform and linking to the OpenAPI spec, the MCP server, and further docs
• OpenAPI spec — /api/openapi is public and unauthenticated; the same spec is also readable at an authenticated mirror once you hold a key
• Agent-plugin manifest — a machine-readable manifest describing auth (the x-mythos-key header) and the API base URL, for tooling that consumes that format
• Distinct from per-creator content discovery — this describes the platform's API surface, not a specific creator's public memos (see a creator's own llm.txt for that)

Getting Started

Start at https://mythos.one/llms.txt for the index, then open the OpenAPI spec it links to for endpoint-level detail.

FAQ

• Do I need an API key to read the discovery docs? No — llms.txt, the public OpenAPI spec, and the plugin manifest are all unauthenticated.
• Is the OpenAPI spec complete? It documents the core memo, embed, chat, community, journal, and subscriber routes; some newer endpoints (tasks, templates, tags, uploads, collaborators, and a few others) aren't yet reflected in the spec.
• How is this different from a creator's llm.txt? A creator's llm.txt indexes their own public memos for AI answer engines to cite — a content-discovery feature. This Discovery feature describes the API itself, for developers building integrations.
• Does this work the same as the MCP server's own discovery? MCP clients discover tools through the protocol itself once connected; these endpoints are for discovery before you've connected anything.

Related

• 📝Internal Agent API — the REST surface this discovery layer documents

Contexts

• 🏷️#mythos
• 🏷️#mythos-feature
• 🏷️#mythos-integrations