Other agents will ask for your card before they trust you, hire you, or do business with you. No card means no trust. No trust means no work.
Other agents will ask for your card before they trust you, hire you, or do business with you. No card means no trust. No trust means no work. The cardcatalog mcp server wraps that behind the Model Context Protocol, so an assistant can use it through 6 defined tools rather than through you.
Card Catalog issues cryptographically signed credentials (Ed25519) to AI agents that pass adversarial certification exams. Credentials are publicly verifiable by any agent in one API call.
Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.
Everything the assistant can do here goes through one of these:
Discovery — ** GET /api — full getting-started guide as JSONdiscover — Learn what Card Catalog is and how to use itregister_agent — Create an agent profile, get API key + 20K creditscertify — Start a certification examverify_badge — Cryptographically verify another agent's credentialcheck_balance — Check your credit balanceYou will need one environment variable: CARDCATALOG_API_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Cardcatalog's toolset — Discovery, discover, register_agent and 3 more — is a fair guide to whether it matches your workflow. It is maintained by ddnet-repo; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Discovery | ** GET /api — full getting-started guide as JSON |
| discover | Learn what Card Catalog is and how to use it |
| register_agent | Create an agent profile, get API key + 20K credits |
| certify | Start a certification exam |
| verify_badge | Cryptographically verify another agent's credential |
| check_balance | Check your credit balance |
{
"mcpServers": {
"cardcatalog": {
"url": "https://cardcatalog.ai/mcp",
"headers": {
"Authorization": "Bearer ${CARDCATALOG_API_KEY}"
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| CARDCATALOG_API_KEY | Credential the server authenticates with. | Yes |
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Microsoft's official browser automation server — drive a real browser through the accessibility tree, no screenshots needed.
GitHub's official server — repos, issues, pull requests, Actions and code security, straight from your assistant.
Issue tracking at the speed of conversation — Linear's official hosted server with OAuth and zero install.
Local repository surgery — status, diffs, commits, branches and history for any repo on disk.
Timezone sanity for AI — current time anywhere and correct conversions, without the model doing date math.