D grade
protocol-mismatch
80 score
1951 ms
0.3.0 version
0.0% uptime over 8 measured probes
AS16509 AMAZON-02 - Amazon.com, Inc., US · US
https://capabilityhostprotocol.com/.well-known/agent-card.json
a2a first seen 2026-09-07 · last seen 2026-09-14 · json
Listed in
| source | name | description | external id |
|---|---|---|---|
| Agenstry | Capability Host Protocol | a2a_agent:capabilityhostprotocol.com |
Same host
agents-txt × 1 ard × 1 llms-txt × 1 · 1 alive mcp × 1 · 1 alive robots × 1 · 1 alive sigdir × 1 x402 × 1
Badge
embed:
<a href="https://agentprobe.org/endpoint/6349"><img src="https://agentprobe.org/badge/6349.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | http | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|---|
| 2026-09-13 14:11 | protocol-mismatch | 80 | 200 | HTTP/1.1 | 1951 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601,"http_version":"HTTP/1.1","vantage":"us-east-1"} | error -32601 for both message/send and SendMessage |
| 2026-09-12 13:06 | protocol-mismatch | 80 | 200 | HTTP/1.1 | 2164 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601,"http_version":"HTTP/1.1","vantage":"us-east-1"} | error -32601 for both message/send and SendMessage |
| 2026-09-11 12:12 | protocol-mismatch | 80 | 200 | HTTP/1.1 | 1833 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601,"http_version":"HTTP/1.1","vantage":"us-east-1"} | error -32601 for both message/send and SendMessage |
| 2026-09-10 11:13 | protocol-mismatch | 80 | 200 | HTTP/1.1 | 1953 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601,"http_version":"HTTP/1.1","vantage":"us-east-1"} | error -32601 for both message/send and SendMessage |
| 2026-09-09 10:16 | protocol-mismatch | 80 | 200 | HTTP/1.1 | 899 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601,"http_version":"HTTP/1.1","vantage":"us-east-1"} | error -32601 for both message/send and SendMessage |
| 2026-09-09 09:16 | connect-fail | 2895 | detailsmeta {"vantage":"us-east-1"} | h2: Invalid input ConnectionInputs.SEND_SETTINGS in state ConnectionState.CLOSED | ||||
| 2026-09-08 08:14 | connect-fail | 521 | detailsmeta {"vantage":"us-east-1"} | WriteError: | ||||
| 2026-09-07 05:34 | protocol-mismatch | 80 | 200 | 273 | 0.3.0 | detailscapabilities {"era":"0.3","skills_count":4,"skills":["discover-capabilities","get-capability-descriptor","browse-adapters","explain-protocol"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["JSONRPC","MCP","capabilities.txt"],"signatures":0}meta {"card_url":"https://www.capabilityhostprotocol.com/.well-known/agent-card.json","card":{"name":"Capability Host Protocol","version":"0.8.0","provider":{"organization":"Capability Host Protocol","url":"https://capabilityhostprotocol.com"},"documentationUrl":"https://docs.capabilityhostprotocol.com"},"missing_fields":[],"endpoint_url":"https://capabilityhostprotocol.com/api/mcp","binding":"JSONRPC","endpoint_status":200,"a2a_error":-32601} | error -32601 for both message/send and SendMessage |