A2A Agent Card Cross-SDK Signature Conformance

com.textforagentsPublished by textforagents.comOfficial publisherv1.0.8Updated Nov 6, 2026

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

The publisher's own server: Agent NOTAMs: hazard bulletins for agents

VerifiedStreamable HTTPWeb executableDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

Remote MCP server that runs cross-SDK signature conformance checks on signed A2A Agent Cards and returns per-SDK verdicts.

What you can do
  • Run a cross-SDK signature conformance verdict check on a signed A2A Agent Card, with a trial or paid accounting option
  • Fetch a previously run check by its id
  • List the watches associated with your account
  • Report which signatures verify in each SDK as a per-SDK verdict matrix
When to use it
Useful when you build or operate A2A agents and need to know whether a signed Agent Card's signatures verify across different SDK implementations, or want to re-check and track earlier results.
Requirements
Remote streamable HTTP endpoint at textforagents.com; no packages, environment variables or headers declared. No authentication is declared, but checks beyond a trial are billed at $0.05 via x402 accounting.
Before you install
Checks beyond the trial incur a $0.05 charge through x402 accounting, so calls can spend money. Checks are tied to your account and retrievable by id, so treat check ids as sensitive. Agent Card data you submit is sent to a third-party service.

Installation

In SourceWeft

  1. Open A2A Agent Card Cross-SDK Signature Conformance in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/com.textforagents%2Fa2a-agent-card-cross-sdk-signature-conformance/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "a2a-agent-card-cross-sdk-signature-confo": {
      "type": "http",
      "url": "https://textforagents.com/products/a2a-agent-card-cross-sdk-signature-conformance/mcp"
    }
  }
}

Tools

3

check_card

Run one cross-SDK signature conformance verdict check (trial or $0.05 x402 accounting applies).

Parameterscardjwksrequiredcard_url

get_check

Fetch one of your checks by id.

Parameterscheck_idrequired

list_watches

List your watches.

Takes no parameters.

Version history

8
  1. v1.0.8LatestNov 6, 2026
  2. v1.0.7Nov 5, 2026
  3. v1.0.6Nov 4, 2026
  4. v1.0.5Nov 1, 2026
  5. v1.0.4Nov 1, 2026
  6. v1.0.3Oct 30, 2026
  7. v1.0.1Oct 29, 2026
  8. v1.0.0Oct 22, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.

Other Textforagents integrations

Agent NOTAMs: hazard bulletins for agents

com.textforagentsOfficial publisher

Remote MCP endpoint that gives agents signed, auto-expiring hazard bulletins for tools and APIs, plus pre-flight checks.

Streamable HTTPWeb executableAuth
Security & MonitoringCredential requiredOct 26, 2026

The Bridge Stack — one stack, every LLM linked

com.textforagentsOfficial publisher

The Bridge Stack — one stack, every LLM linked's hosted MCP server, published by textforagents.com; no sign-in required; Streamable HTTP; 3 tools.

Streamable HTTPWeb executable
AI & ML3 toolsNov 3, 2026

Combined Server-Surface Census

com.textforagentsOfficial publisher

Combined Server-Surface Census's hosted MCP server, published by textforagents.com; no sign-in required; Streamable HTTP; 5 tools.

Streamable HTTPWeb executable
5 toolsOct 31, 2026

Widget-storage residue verdict

com.textforagentsOfficial publisher

Widget-storage residue verdict's hosted MCP server, published by textforagents.com; no sign-in required; Streamable HTTP; 3 tools.

Streamable HTTPWeb executable
Browser Automation3 toolsOct 29, 2026

Tool-Confusability Recovery Loop

com.textforagentsOfficial publisher

Remote service that measures confusion between tools in an agent tool catalog, ranks fixes, and issues signed recovery receipts.

Streamable HTTPWeb executable
AI & ML6 toolsOct 29, 2026