--- title: "MCP servers: API key | Agent MCP Directory" description: "19 MCP endpoints with an API key, as seen by a read-only connector on 4 November 2026. Each entry shows what the challenge said." canonical: https://agentmcpdirectory.com/directory/auth/api-key site: "Agent MCP Directory" last_updated: 2026-11-05 section: "Directory lists" --- # MCP servers: API key | Agent MCP Directory > 19 MCP endpoints with an API key, as seen by a read-only connector on 4 November 2026. Each entry shows what the challenge said. Source: https://agentmcpdirectory.com/directory/auth/api-key Site: Agent MCP Directory Last reviewed: 2026-11-05 # Auth type: API key 19 endpoints use an API key: 0 listed tools to a client with no credentials and 0 answered with a sign-in challenge (tools not seen, not counted). Rows run from Appcircle to testRigor. The server answered 401 or 403 and asks for a key or bearer token with no OAuth metadata for an agent to follow. ## Rows | Company | MCP server | CLI | Ora score | OpenAPI | WebMCP | Last verified | | --- | --- | --- | --- | --- | --- | --- | | Appcircle appcircle.io | Credential wall API key | – | 71 B | – | no | 2026-11-04 | | Bitculator bitculator.com | Credential wall API key | – | | – | not read | 2026-11-04 | | Cavyro cavyro.com | Credential wall API key | – | 73 B | yes | not read | 2026-11-04 | | Contentstack contentstack.com | Credential wall API key | – | 67 C | – | no | 2026-11-04 | | Devtron devtron.ai | Credential wall API key | – | 48 C | – | no | 2026-11-04 | | Hookstep hookstep.in | Credential wall API key | – | | – | not read | 2026-11-04 | | Klavis klavis.ai | Credential wall API key | – | 71 B | – | no | 2026-11-04 | | Mezmo mezmo.com | Credential wall API key | – | 65 C | – | no | 2026-11-04 | | Netdata netdata.cloud | Credential wall API key | – | | – | not read | 2026-11-04 | | Northflank northflank.com | Credential wall API key | – | 53 C | – | no | 2026-11-04 | | Oids tryoids.com | Credential wall API key | – | | – | not read | 2026-11-04 | | OneSchema oneschema.co | Credential wall API key | – | 56 C | – | no | 2026-11-04 | | PageProofer pageproofer.com | Credential wall API key | – | | – | not read | 2026-11-04 | | PrintFriendly printfriendly.com | Credential wall API key | – | | yes | not read | 2026-11-04 | | Screenshot Scout screenshotscout.com | Credential wall API key | – | | – | not read | 2026-11-04 | | SmartGate smartgate.network | Credential wall API key | – | | – | not read | 2026-11-04 | | Sonatype sonatype.com | Credential wall API key | – | 65 C | – | no | 2026-11-04 | | StackOverflow stackoverflow.com | Credential wall API key | – | 23 F | – | no | 2026-11-04 | | testRigor testrigor.com | Credential wall API key | – | 56 C | – | no | 2026-11-04 | Ora score is Ora's cached score and grade for the company's domain, read on 5 November 2026 from GET /api/score/{domain}, or from Ora's GET /api/leaderboard of the same day where that was read first (a vendor-published figure). A blank cell means Ora returned no cached score for the domain, or the domain was not read. MCP status - [Verified](https://agentmcpdirectory.com/directory/status/verified/) 263 - [Sign-in required, tools not seen, not counted](https://agentmcpdirectory.com/directory/status/sign-in/) 533 - [Credential wall](https://agentmcpdirectory.com/directory/status/credential-wall/) 19 - [No answer](https://agentmcpdirectory.com/directory/status/no-answer/) 47 - [No tools listed](https://agentmcpdirectory.com/directory/status/no-tools/) 2 - [None found](https://agentmcpdirectory.com/directory/status/none-found/) 472 Auth type - [No authentication](https://agentmcpdirectory.com/directory/auth/none/) 263 - [API key](https://agentmcpdirectory.com/directory/auth/api-key/) 19 - [OAuth with client registration](https://agentmcpdirectory.com/directory/auth/oauth-dcr/) 517 - [OAuth without client registration](https://agentmcpdirectory.com/directory/auth/oauth/) 16 Edition 4 November 2026 Method [How rows are verified](https://agentmcpdirectory.com/method/) Data [CSV and JSON](https://agentmcpdirectory.com/data/) Markdown [This page as markdown](https://agentmcpdirectory.com/directory/auth/api-key/index.md) ## Sources - [Official MCP Registry API](https://registry.modelcontextprotocol.io/v0/servers), read 4 November 2026 - [Ora public leaderboard](https://ora.ai/leaderboard?utm_source=agentmcpdirectory.com&utm_medium=referral&utm_campaign=list), read 4 November 2026 - [Ora leaderboard, GET /api/leaderboard](https://ora.ai/api/leaderboard?utm_source=agentmcpdirectory.com&utm_medium=referral&utm_campaign=list), read 5 November 2026 - [Ora API reference, including GET /api/score/{domain}](https://ora.ai/llms-full.txt?utm_source=agentmcpdirectory.com&utm_medium=referral&utm_campaign=list), read 5 November 2026 Last reviewed 5 November 2026