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Blinded Macaroon Signer MCP
x402
Blinded Macaroon Signer MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).
Signs a blinded macaroon token, enabling privacy-preserving authentication and authorization workflows.
Price / call$0.25
Success—
StatusUnknown
How this service works
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Output
Returns a signed version of the submitted blinded macaroon data, which the requesting party can then unblind to obtain a valid, issuer-signed macaroon credential usable for authentication or authorization.
Example use cases
Anonymous credential issuance for users
“I need to issue a blind-signed macaroon credential to a user without learning their identity — can you run this blinded token data through the blinded macaroon signer?”
Privacy-preserving API access token
“Sign this blinded macaroon so my app can grant API access to users without tying the token back to their identity during the signing step.”
Blind voting or attestation token
“I'm building a system where participants get signed tokens without the signer knowing who they are — please blind-sign this macaroon data string for the next participant.”
Technical details
Endpoint
POSThttps://api.m2mcent.com/blinded-macaroon-signer-mcp/api/processWhen to prefer
Choose this endpoint when you need a cryptographic blind-signing service for macaroon tokens — specifically when implementing privacy-preserving authentication flows where the signer must not learn the content of the token being signed. Prefer this over standard macaroon signing when anonymity or unlinkability between the signing and usage phases is a requirement.
Side effects
- Invalid or malformed blinded macaroon data returns an error response
- Empty or missing 'data' field causes a validation failure
- Malformed base64 or encoding issues in the input string may cause processing errors
- Payment failure or insufficient funds results in a 402 response before processing
- Oversized input data may be rejected with a payload-too-large error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| payload | string |
Output
Schema · Response
{
"type": "json",
"example": {
"success": true
}
}Tags
x402
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