--- title: "Key directory: definition | Agent Ready Crawlers" description: "Key directory: the JSON file at /.well-known/http-message-signatures-directory that lists a signer's public keys for Web Bot Auth verification." canonical: https://agentreadycrawlers.com/glossary/key-directory site: "Agent Ready Crawlers" last_updated: 2026-11-04 section: "Glossary" --- # Key directory: definition | Agent Ready Crawlers > Key directory: the JSON file at /.well-known/http-message-signatures-directory that lists a signer's public keys for Web Bot Auth verification. Source: https://agentreadycrawlers.com/glossary/key-directory Site: Agent Ready Crawlers Last reviewed: 2026-11-04 Glossary # Key directory In short A JSON document at /.well-known/http-message-signatures-directory listing a signer's public keys for Web Bot Auth, served with the media type application/http-message-signatures-directory+json. 4 operators in the Verification Ledger publish a directory URL. Example: https://chatgpt.com/.well-known/http-message-signatures-directory served one Ed25519 key on 2026-11-04. Related: Verification Ledger and Verify Web Bot Auth signatures. ## Definition A JSON document at /.well-known/http-message-signatures-directory listing a signer's public keys for Web Bot Auth, served with the media type application/http-message-signatures-directory+json. ## Sourced example https://chatgpt.com/.well-known/http-message-signatures-directory served one Ed25519 key on 2026-11-04. [Source](https://chatgpt.com/.well-known/http-message-signatures-directory), read 2026-11-04. ## How it shows up here 4 operators in the Verification Ledger publish a directory URL. - [Verification Ledger](https://agentreadycrawlers.com/verification/) - [Verify Web Bot Auth signatures](https://agentreadycrawlers.com/guides/verify-web-bot-auth/) Previous: [IP range JSON](https://agentreadycrawlers.com/glossary/ip-range-json/). Next: [Know Your Agent (KYA)](https://agentreadycrawlers.com/glossary/know-your-agent/). [All 41 terms](https://agentreadycrawlers.com/glossary/). ## Sources - [chatgpt.com: http message signatures directory](https://chatgpt.com/.well-known/http-message-signatures-directory) read 2026-11-04 Last reviewed 2026-11-04