B grade
auth-required
30 score
315 ms
100.0% uptime over 5 measured probes
AS16509 AMAZON-02 - Amazon.com, Inc., US · US
https://beta.once.app/api/mcp
mcp first seen 2026-09-11 · last seen 2026-09-16 · json
Listed in
| source | name | description | external id |
|---|---|---|---|
| Official MCP Registry | ONCE | Music distribution for agents: upload, AI-check, submit and track releases on ONCE. | app.once/mcp |
| Agenstry | ONCE | mcp:app.once/mcp |
Same host
agents-txt × 1 ard × 1 · 1 alive llms-txt × 1 robots × 1 · 1 alive sigdir × 1 · 1 alive
Badge
embed:
<a href="https://agentprobe.org/endpoint/3918338"><img src="https://agentprobe.org/badge/3918338.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | http | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|---|
| 2026-09-16 00:02 | auth-required | 30 | 401 | HTTP/1.1 | 315 | detailsmeta {"final_url":"https://beta.once.app/api/mcp","www_authenticate":"Bearer realm=\"once-mcp\", resource_metadata=\"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp\", scope=\"once:mcp\"","oauth":{"prm_url":"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp","resource":"https://beta.once.app/api/mcp","authorization_servers":["https://beta.once.app"],"scopes_supported":["once:mcp"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-14 23:04 | auth-required | 30 | 401 | HTTP/1.1 | 842 | detailsmeta {"final_url":"https://beta.once.app/api/mcp","www_authenticate":"Bearer realm=\"once-mcp\", resource_metadata=\"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp\", scope=\"once:mcp\"","oauth":{"prm_url":"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp","resource":"https://beta.once.app/api/mcp","authorization_servers":["https://beta.once.app"],"scopes_supported":["once:mcp"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-13 23:02 | auth-required | 30 | 401 | HTTP/1.1 | 312 | detailsmeta {"final_url":"https://beta.once.app/api/mcp","www_authenticate":"Bearer realm=\"once-mcp\", resource_metadata=\"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp\", scope=\"once:mcp\"","oauth":{"prm_url":"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp","resource":"https://beta.once.app/api/mcp","authorization_servers":["https://beta.once.app"],"scopes_supported":["once:mcp"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-12 23:00 | auth-required | 30 | 401 | HTTP/1.1 | 507 | detailsmeta {"final_url":"https://beta.once.app/api/mcp","www_authenticate":"Bearer realm=\"once-mcp\", resource_metadata=\"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp\", scope=\"once:mcp\"","oauth":{"prm_url":"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp","resource":"https://beta.once.app/api/mcp","authorization_servers":["https://beta.once.app"],"scopes_supported":["once:mcp"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-11 22:03 | auth-required | 30 | 401 | HTTP/1.1 | 376 | detailsmeta {"final_url":"https://beta.once.app/api/mcp","www_authenticate":"Bearer realm=\"once-mcp\", resource_metadata=\"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp\", scope=\"once:mcp\"","oauth":{"prm_url":"https://beta.once.app/.well-known/oauth-protected-resource/api/mcp","resource":"https://beta.once.app/api/mcp","authorization_servers":["https://beta.once.app"],"scopes_supported":["once:mcp"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 |