B grade
auth-required
30 score
543 ms
100.0% uptime over 13 measured probes
AS13335 CLOUDFLARENET - Cloudflare, Inc., US · US
https://customerio.usefulapi.io/mcp
mcp first seen 2026-09-07 · last seen 2026-09-19 · json
Listed in
| source | name | description | external id |
|---|---|---|---|
| Official MCP Registry | io.usefulapi/customerio | Query people, segments, campaigns, and message deliveries; send transactional email or broadcasts. | io.usefulapi/customerio |
| Agenstry | io.usefulapi/customerio | mcp:io.usefulapi/customerio |
Same host
agents-txt × 1 ard × 1 llms-txt × 1 robots × 1 · 1 alive sigdir × 1
Badge
embed:
<a href="https://agentprobe.org/endpoint/49705"><img src="https://agentprobe.org/badge/49705.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | http | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|---|
| 2026-09-19 16:00 | auth-required | 30 | 401 | HTTP/1.1 | 543 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-18 15:05 | auth-required | 30 | 401 | HTTP/1.1 | 809 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-17 14:08 | auth-required | 30 | 401 | HTTP/1.1 | 553 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-16 14:01 | auth-required | 30 | 401 | HTTP/1.1 | 653 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-15 13:04 | auth-required | 30 | 401 | HTTP/1.1 | 541 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-14 12:05 | auth-required | 30 | 401 | HTTP/1.1 | 572 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-13 11:03 | auth-required | 30 | 401 | HTTP/1.1 | 439 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-12 10:04 | auth-required | 30 | 401 | HTTP/1.1 | 370 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-11 09:06 | auth-required | 30 | 401 | HTTP/1.1 | 208 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-10 09:02 | auth-required | 30 | 401 | HTTP/1.1 | 143 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"http_version":"HTTP/1.1","vantage":"us-east-1"} | HTTP 401 | |
| 2026-09-09 08:05 | auth-required | 30 | 401 | 961 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"vantage":"us-east-1"} | HTTP 401 | ||
| 2026-09-08 07:49 | auth-required | 30 | 401 | 185 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]},"vantage":"us-east-1"} | |||
| 2026-09-07 03:28 | auth-required | 30 | 401 | 201 | detailsmeta {"final_url":"https://customerio.usefulapi.io/mcp","www_authenticate":"Bearer realm=\"OAuth\", resource_metadata=\"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp\", error=\"invalid_token\", error_description=\"Missing or invalid access token\"","oauth":{"prm_url":"https://customerio.usefulapi.io/.well-known/oauth-protected-resource/mcp","resource":"https://customerio.usefulapi.io/mcp","authorization_servers":["https://customerio.usefulapi.io"],"scopes_supported":["read","write"]}} |