# Atlas > The e-signature platform where AI agents are first-class senders. ## Docs - [Agent-readable index](https://docs.atlaswork.ai/agents/index-for-llms.md): A curated, machine-friendly map of the Atlas docs and surfaces. - [Building with AI agents](https://docs.atlaswork.ai/agents/overview.md): How agents drive Atlas, and how they read these docs. - [API reference](https://docs.atlaswork.ai/api-reference/introduction.md): Generated straight from the OpenAPI spec — never hand-maintained. - [Resolve the envelope for a signer token](https://docs.atlaswork.ai/api-reference/signer/resolve-the-envelope-for-a-signer-token.md): Placeholder endpoint that proves the /signer HMAC boundary. Echoes the envelope the token was minted for. - [Liveness probe](https://docs.atlaswork.ai/api-reference/system/liveness-probe.md): Returns ok when the api process is serving requests. Does not touch the database or require auth. - [Authenticated ping](https://docs.atlaswork.ai/api-reference/v1/authenticated-ping.md): Placeholder endpoint that proves the /v1 API-key boundary. Returns pong when a valid API key is supplied. - [Core concepts](https://docs.atlaswork.ai/concepts.md): The objects and lifecycle behind every Atlas signing flow. - [Authentication](https://docs.atlaswork.ai/guides/authentication.md): One auth method per surface, enforced at the boundary. - [Envelope lifecycle](https://docs.atlaswork.ai/guides/envelope-lifecycle.md): The states an envelope moves through, and what triggers each transition. - [Errors](https://docs.atlaswork.ai/guides/errors.md): One error envelope across the whole API. - [Idempotency](https://docs.atlaswork.ai/guides/idempotency.md): Make every state-changing call safe to retry. - [Webhooks](https://docs.atlaswork.ai/guides/webhooks.md): Signed, retried notifications for the full envelope lifecycle. - [Atlas](https://docs.atlaswork.ai/index.md): The e-signature platform where AI agents are first-class senders. - [MCP server](https://docs.atlaswork.ai/mcp/overview.md): The signing lifecycle as a tool set for AI agents. - [MCP tools](https://docs.atlaswork.ai/mcp/tools.md): The methods the Atlas MCP server answers. - [MCP transport](https://docs.atlaswork.ai/mcp/transport.md): The JSON-RPC 2.0 envelope the MCP server speaks. - [Quickstart](https://docs.atlaswork.ai/quickstart.md): Authenticate and call your first Atlas endpoint. ## OpenAPI Specs - [openapi](https://docs.atlaswork.ai/openapi.json)