Free proof-of-existence attestation for digital files, MCP tools for the imgauth service.
Attest MCP server exists for a simple reason — assistants are far more useful when they can act on Attest directly instead of describing what you should do. Free proof-of-existence attestation for digital files, MCP tools for the imgauth service.
Listed on the official MCP Registry as io.github.SPAZIO-GENESI/attest-mcp.
Once Attest is connected, these are the calls the assistant has available:
authorize — Start or continue the device-flow authorizationattest_file — Hash a local file (streamed) and attest itget_certificate_pdf — Mint a fresh signed PDF, or recover an already-archived one, saved to diskverify_file — Hash a local file and check it against a declared hash + signatureverify_certificate — Verify a certificate's signature without a local filecheck_anchor — Check/download the OpenTimestamps (Bitcoin) proofservice_status — Traffic-light status of the attestation serviceThe server ships on npm as @spazio-genesi/attest-mcp-setup, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
You will need 2 environment variables: IMGAUTH_API_KEY, IMGAUTH_BASE_URL. 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.
This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Attest's toolset — authorize, attest_file, get_certificate_pdf and 4 more — is a fair guide to whether it matches your workflow. It is maintained by SPAZIO-GENESI; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Attest's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| authorize | Start or continue the device-flow authorization. |
| attest_file | Hash a local file (streamed) and attest it. |
| get_certificate_pdf | Mint a fresh signed PDF, or recover an already-archived one, saved to disk. |
| verify_file | Hash a local file and check it against a declared hash + signature. |
| verify_certificate | Verify a certificate's signature without a local file. |
| check_anchor | Check/download the OpenTimestamps (Bitcoin) proof. |
| service_status | Traffic-light status of the attestation service. |
{
"mcpServers": {
"attest": {
"command": "npx",
"args": ["-y", "@spazio-genesi/attest-mcp-setup"],
"env": {
"IMGAUTH_API_KEY": "your-value",
"IMGAUTH_BASE_URL": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| IMGAUTH_API_KEY | Credential the server authenticates with. | Yes |
| IMGAUTH_BASE_URL | Endpoint or connection string the server talks to. | Yes |
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