# Agentic Resource Discovery (ARD) manifest

[1 · Discover](/category/discover/)

| Agentic Resource Discovery (ARD) manifest |
| --- |
| Category | [Discover](/category/discover/) |
| Also known as | ard.json, /.well-known/ard.json, ai-catalog.json |
| Related | [Agentic Resource Discovery](/protocols/ard/), [AI Catalog well-known file](/protocols/ai-catalog-well-known-file/) |

[Discover](/category/discover/) An ARD manifest (/.well-known/ard.json, superseding /.well-known/ai-catalog.json in ARD v0.91) is a JSON document published at an origin's well-known path that inventories every agent-facing resource on that domain in a single fetch: MCP endpoints, SEP-2127 Server Cards, A2A Agent Cards, OpenAPI specifications, /llms.txt, and payment/auth metadata. It solves the multi-probe discovery problem by giving agents one canonical directory at Step 1 (Discover). Used by: ard, ai-catalog-well-known-file.

## Instances

Not applicable.

## See also

- [Agentic Resource Discovery](/protocols/ard/)
- [AI Catalog well-known file](/protocols/ai-catalog-well-known-file/)

## References

- [https://agenticresourcediscovery.org/spec/](https://agenticresourcediscovery.org/spec/) (2026-08-26) VERIFIED

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