agents-txt.com valid
agents.txt Standard
The open specification for AI agent capability declarations. Layer 4 of the agent-readiness stack.
- Authority
- 45 reach 0 · trust 5 · quality 25 · freshness 15
- Tier
- listed
- llms.txt
- https://agents-txt.com/llms.txt
- llms-full.txt
- https://agents-txt.com/llms-full.txt
- Sections
- 2
- Links
- 18
- Size
- 4722 bytes
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- Categories
- AI and machine learning
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-23T01:55:50.480Z
- Last checked
- 2026-10-23T01:55:50.870Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-23T01:55:50.485Z. Cached copy · Source on agents-txt.com
# agents.txt Standard
> The open specification for AI agent capability declarations. Layer 4 of the agent-readiness stack.
## Specification
- [agents.txt Standard v1.0](https://agents-txt.com): The open specification for AI agent capability declarations. Covers file format, directives, discovery, payment protocols (x402, MPP), authorization (agent-auth), MCP endpoint declaration, and skills. Layer 4 of the agent-readiness stack.
- [agents.txt Standard v1.0 (full text)](https://agents-txt.com/spec): The complete text of the v1.0 specification rendered as a single page: file format, directives, discovery, the agents.json schema, the four capability blocks (Payments, Authorization, MCP, Skills) plus A2A and UCP, §4.5 serving requirements, and the registries defined in §17.
- [agents.txt Registry](https://agents-txt.com/registry): Live surface for the two registries defined in §17 of the spec: the directive names registered for use in agents.txt, and the per-protocol object shapes registered for use in agents.json. Authoritative between spec versions; the next spec version absorbs accumulated changes.
- [Audit a site against the agents.txt spec](https://agents-txt.com/audit): Audits any live site against the agents.txt specification: validates /agents.txt and /agents.json against §3–§11, the §5 schema, §4.5 serving headers, and cross-file consistency, and reports an agent-readiness score. Runs in the browser or via the audit_site MCP tool.
- [About agents.txt](https://agents-txt.com/about): Working group, governance, licensing (CC0 spec / Apache 2.0 code), adoption paths, and contact channels. Trust anchor page covering the questions agents and developers ask before adopting the spec.
- [agents.txt vs other agent-readiness standards](https://agents-txt.com/compare): Side-by-side comparison of agents.txt against MCP, A2A, UCP, OpenAPI, OAuth 2.0, llms.txt, robots.txt, ACP, WebMCP, and Agent Skills Discovery. agents.txt is the discovery layer that lets agents find which capabilities a site exposes before negotiating any single protocol.
- [AGENTS.md (agent instructions)](https://agents-txt.com/AGENTS.md): When-to-use instructions for AI agents working against this repository: scope of the spec, boundary with the herald toolkit, where each capability lives. Same content as the AGENTS.md at the repo root, served at the agents.md convention path.
## Demos
- [Demos index](https://agents-txt.com/demo): Live demonstrations of every capability the spec advertises.
- [Agent Auth demo](https://agents-txt.com/demo/auth): 7-step Ed25519 + JWT handshake against the agent-auth Cloudflare Worker.
- [auth.md demo](https://agents-txt.com/demo/authmd): Agentic registration walkthrough: PRM discovery, AS metadata with agent_auth block, anonymous registration, optional OTP claim ceremony, credential use.
- [MCP demo](https://agents-txt.com/demo/mcp): Streamable HTTP MCP session: initialize, tools/list, get_spec, validators.
- [Payments demo](https://agents-txt.com/dem
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