A2A Agent Card Cross-SDK Signature Conformance

com.textforagents/a2a-agent-card-cross-sdk-signature-conformance · textforagents.com · MCP, Website

Per-SDK verdict matrix for signed A2A Agent Cards: which signatures verify in each SDK.

Name and description as published by MCP Registry

Live

Last successful check: 26 Oct 2026, 09:19 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

At textforagents.com, its best endpoint.

How addrbook checks →

Connect

https://textforagents.com/products/a2a-agent-card-cross-sdk-signature-conformance/mcphttps://textforagents.com/products/a2a-agent-card-cross-sdk-signature-conformance/

MCP: addrbook sends an initialize and a tools/list. It never calls a tool. Website: addrbook loads the page.

Who's behind it

Listed by: MCP Registrycom.textforagents/a2a-agent-card-cross-sdk-signature-conformancelast seen 25 Oct, 17:50 UTC
Wallets named: None in its listings
Listed since: 25 Oct 2026, 17:50 UTC

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
textforagents.com	MCP	Live	26 Oct, 09:17	26 Oct, 09:17	100%	100%	3
textforagents.com	Website	Live	26 Oct, 09:19	26 Oct, 09:19	100%	100%	—