JWT Decode API

x402

JWT Decode API is a paid API for AI agents from api.bakhour.ca, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Decodes a JWT token and returns its header, payload, and signature verification status

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Decision-grade security/due-diligence outcome reports ($20-$100) plus deterministic paid utilities ($0.001+) for software agents and automated workflows.

Output

Returns a JSON object with three fields: 'header' (containing algorithm and token type), 'payload' (containing the decoded JWT claims such as sub, iat, exp, etc.), and 'signature_verified' (boolean indicating whether the signature was cryptographically verified).

Example use cases

Inspect bearer token claims

“I have this JWT token from my API response and I want to see the payload claims and what algorithm it's using — can you decode it for me? The token is eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiI0MiIsImVtYWlsIjoidGVzdEB0ZXN0LmNvbSJ9.signature”

Debug authentication token

“I'm getting auth errors and I want to peek inside this JWT to check the expiry and subject — can you decode eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyXzk5IiwiZXhwIjoxNjAwMDAwMDAwfQ.abc123 and tell me what's in there?”

Verify JWT algorithm used

“What algorithm is this JWT using and what's the payload? Token: eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJteWFwcCIsInJvbGUiOiJhZG1pbiJ9.sig”

Technical details

Endpoint

GEThttps://api.bakhour.ca/jwt/decode

When to prefer

Use this endpoint when you need a quick, serverless way to decode and inspect a JWT token's header and payload without setting up a local JWT library. Ideal for agents and automated workflows that encounter JWTs in API responses and need to extract claims like subject, expiry, or roles on the fly. Prefer this over implementing JWT parsing locally when operating in lightweight scripting environments or when you need a deterministic, paid utility call.

Side effects

Malformed or non-JWT string returns an error or unparseable response
Missing required 'token' query parameter results in a validation error
Invalid base64 encoding in token segments causes a decode failure
Network or service unavailability returns a non-200 HTTP status
Payment failure (402) if USDC payment header is missing or insufficient

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "header": {
      "alg": "HS256"
    },
    "payload": {
      "sub": "123"
    },
    "signature_verified": false
  }
}

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How this service works

Decision-grade security/due-diligence outcome reports ($20-$100) plus deterministic paid utilities ($0.001+) for software agents and automated workflows.

Output

Example use cases

Inspect bearer token claims

Debug authentication token

Verify JWT algorithm used

“What algorithm is this JWT using and what's the payload? Token: eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJteWFwcCIsInJvbGUiOiJhZG1pbiJ9.sig”

Technical details

Endpoint

GEThttps://api.bakhour.ca/jwt/decode

When to prefer

Side effects

Malformed or non-JWT string returns an error or unparseable response
Missing required 'token' query parameter results in a validation error
Invalid base64 encoding in token segments causes a decode failure
Network or service unavailability returns a non-200 HTTP status
Payment failure (402) if USDC payment header is missing or insufficient

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "header": {
      "alg": "HS256"
    },
    "payload": {
      "sub": "123"
    },
    "signature_verified": false
  }
}