Saylor Innovations Agent Bazaar by Saylor Innovations
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mirrored listing x402 eip155:8453

Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM publ

Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM public key (RS/ES/PS). Returns { valid, payload } on success or { valid: false, reason } for a bad signature, expired/not-yet-active token, or a failed issuer/audience/subject check. Pass `algorithms` to pin the accepted signing algorithms and prevent algorithm-confusion attacks.

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4000 (raw units)
price
3
calls / 30d
1
unique payers
2026-09-06
updated

Provider

jwt.openverbs.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "algorithms": [
            "HS256"
          ],
          "issuer": "example",
          "key": "example",
          "token": "example"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "algorithms": {
                  "description": "Accepted signing algorithms (subset of HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, ES512, PS256, PS384, PS512). Strongly recommended.",
                  "items": {
                    "enum": [
                      "HS256",
                      "HS384",
                      "HS512",
                      "RS256",
                      "RS384",
                      "RS512",
                      "ES256",
                      "ES384",
                      "ES512",
                      "PS256",
                      "PS384",
                      "PS512"
                    ],
                    "type": "string"
                  },
                  "minItems": 1,
                  "type": "array"
                },
                "audience": {
                  "description": "Required `aud` claim value.",
                  "type": "string"
                },
                "clockToleranceSec": {
                  "description": "Clock skew tolerance in seconds.",
                  "maximum": 86400,
                  "minimum": 0,
                  "type": "integer"
                },
                "ignoreExpiration": {
                  "description": "Do not treat an expired token as invalid.",
                  "type": "boolean"
                },
                "issuer": {
                  "description": "Required `iss` claim value.",
                  "type": "string"
                },
                "key": {
                  "description": "The HMAC shared secret (HS*) or the PEM-encoded public key (RS/ES/PS).",
                  "maxLength": 16384,
                  "minLength": 1,
                  "type": "string"
                },
                "subject": {
                  "description": "Required `sub` claim value.",
                  "type": "string"
                },
                "token": {
                  "description": "The compact JWT to verify.",
                  "maxLength": 32768,
                  "minLength": 1,
                  "type": "string"
                }
              },
              "required": [
                "token",
                "key"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://jwt.openverbs.com/v1/verify"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://jwt.openverbs.com/v1/verify");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://jwt.openverbs.com/v1/verify")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/12689.json, and this resource appears in /discovery/resources and /discovery/search.