Free proof-of-existence attestation for digital files, MCP tools for the imgauth service.
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. 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.
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.Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| 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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