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AI Inference · x402 · early usage

PKCS#10 certificate signing request (CSR) inspector — parse requested identities and pu…

PKCS#10 certificate signing request (CSR) inspector — parse requested identities and public-key metadata, calculate a fingerprint, and check the included self-signature without CA approval claims.

by artifact-inspector.use.x402atlas.com · discovered, not yet claimed by its owner · updated 2026-10-06

30d calls3
30d payers2
MethodPOST
Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

PKCS#10 certificate signing request (CSR) inspector — parse requested identities and public-key metadata, calculate a fingerprint, and check the included self-signature without CA approval claims.

Tags: csr-parser · pkcs10 · certificate-request · signature-check · x509 · bazaar

Call contract

Method
POST
Input
json
Output
json
Last paid call
2026-10-06
Input example from Bazaar metadata
{
  "pem": "-----BEGIN CERTIFICATE REQUEST-----\nMIIBCjCBvQIBADBGMSUwIwYDVQQKExx4NDAyQXRsYXMgU3ludGhldGljIEV4YW1w\nbGVzMR0wGwYDVQQDExRzZXJ2aWNlLmV4YW1wbGUudGVzdDAqMAUGAytlcAMhAHm1\nVi6P5lT5QHixEuipi6eQH4U65pW+1+DjkQutBJZkoEQwQgYJKoZIhvcNAQkOMTUw\nMzAxBgNVHREEKjAoghRzZXJ2aWNlLmV4YW1wbGUudGVzdIIQYXBpLmV4YW1wbGUu\ndGVzdDAFBgMrZXADQQBSNLlAOUHeVlbhnQE+VCg5pvxbKEdQYfLO4egstCTlMYDv\neA4dF/Bwz0dTGJt38ORmedOR1Z9gyoFAPWHaMr4M\n-----END CERTIFICATE REQUEST-----\n"
}
Output example
{
  "algorithm_version": "pkcs10-csr-inspect-v1",
  "csr": {
    "fingerprint_sha256": "A0:99:82:7B:37:CA:52:40:D4:D1:C5:D9:17:DB:70:47:AA:DE:D7:64:CA:48:5E:26:6A:7C:A1:4D:AC:46:87:AA",
    "public_key": {
      "algorithm": "Ed25519",
      "bits": 256
    },
    "requested_extensions": [
      {
        "critical": false,
        "oid": "2.5.29.17"
      }
    ],
    "sans": {
      "dns_names": [
        "service.example.test",
        "api.example.test"
      ],
      "email_addresses": [],
      "ip_addresses": [],
      "uris": []
    },
    "signature_algorithm": "Ed25519",
    "signature_valid": true,
    "subject": "CN=service.example.test,O=x402Atlas Synthetic Examples",
    "subject_rdns": [
      [
        {
          "name": "organizationName",
          "oid": "2.5.4.10",
          "value": "x402Atlas Synthetic Examples"
        }
      ],
      [
        {
          "name": "commonName",
          "oid": "2.5.4.3",
          "value": "service.example.test"
        }
      ]
    ]
  },
  "operation": "csr-inspect",
  "warnings": [
    "A valid CSR self-signature proves only internal possession of the included key, not identity, trust, CA approval, or certificate issuance."
  ]
}

Use with an agent

  1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
  2. Inspect. Fetch /resources/28643.json for the price and payment options.
  3. Pay. Call GET https://artifact-inspector.use.x402atlas.com/csr. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
  4. Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Polygon, Arbitrum One, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price
$0.005 / request
Protocol
x402 v2
Auth
No account or API key. Pay per request.
Networks
Base, Polygon, Arbitrum One, Solana
Demand
3 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

SchemeNetworkAssetAmountPay toTimeout
exactBase
eip155:8453		USDC$0.0050x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2300s
exactPolygon
eip155:137		USDC$0.0050x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2300s
exactArbitrum One
eip155:42161		USDC$0.0050x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2300s
exactSolana
solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp		USDC$0.005ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ300s
accepts[] (raw JSON)
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)
{
  "properties": {
    "example": {
      "additionalProperties": false,
      "properties": {
        "_atlas": {
          "additionalProperties": false,
          "description": "Atlas documentation and related-route metadata added after deployment",
          "properties": {
            "docs": {
              "description": "Documentation URL for this bridge",
              "format": "uri",
              "maxLength": 512,
              "type": "string"
            },
            "related": {
              "description": "Bounded related Atlas routes",
              "items": {
                "additionalProperties": false,
                "description": "One related Atlas route",
                "properties": {
                  "bridge": {
                    "description": "Related bridge name",
                    "maxLength": 64,
                    "type": "string"
                  },
                  "docs": {
                    "description": "Related bridge documentation URL",
                    "format": "uri",
                    "maxLength": 512,
                    "type": "string"
                  },
                  "summary": {
                    "description": "Short capability summary",
                    "maxLength": 256,
                    "type": "string"
                  },
                  "url": {
                    "description": "Related route URL",
                    "format": "uri",
                    "maxLength": 512,
                    "type": "string"
                  }
                },
                "required": [
                  "bridge",
                  "url",
                  "docs",
                  "summary"
                ],
                "type": "object"
              },
              "maxItems": 3,
              "type": "array"
            }
          },
          "required": [
            "docs"
          ],
          "type": "object"
        },
        "algorithm_version": {
          "const": "pkcs10-csr-inspect-v1",
          "description": "Pinned CSR inspection contract",
          "type": "string"
        },
        "csr": {
          "additionalProperties": false,
          "description": "Normalized PKCS#10 request fields and included self-signature result",
          "properties": {
            "fingerprint_sha256": {
              "description": "Colon-separated uppercase SHA-256 fingerprint of the exact DER bytes",
              "pattern": "^([0-9A-F]{2}:){31}[0-9A-F]{2}$",
              "type": "string"
            },
            "public_key": {
              "additionalProperties": false,
              "description": "Included public-key algorithm and size",
              "properties": {
                "algorithm": {
                  "description": "Parsed public-key algorithm",
                  "type": "string"
                },
                "bits": {
                  "description": "Public-key or curve bit size; zero only for an unsupported parsed type",
                  "maximum": 16384,
                  "minimum": 0,
                  "type": "integer"
                }
              },
              "required": [
                "algorithm",
                "bits"
              ],
              "type": "object"
            },
            "requested_extensions": {
              "description": "Requested extension identifiers in deterministic OID order",
              "items": {
                "additionalProperties": false,
                "description": "One requested extension identifier without raw extension bytes",
                "properties": {
                  "critical": {
                    "description": "Whether the requested extension is marked critical",
                    "type": "boolean"
                  },
                  "oid": {
                    "description": "Dotted-decimal extension object identifier",
                    "type": "string"
                  }
                },
                "required": [
                  "oid",
                  "critical"
                ],
                "type": "object"
              },
              "maxItems": 128,
              "type": "array"
            },
            "sans": {
              "additionalProperties": false,
              "description": "Caller-provided subject alternative names; URI values were not fetched",
              "properties": {
                "dns_names": {
                  "description": "DNS subject alternative names",
                  "items": {
                    "description": "Normalized string value",
                    "type": "string"
                  },
                  "maxItems": 256,
                  "type": "array"
                },
                "email_addresses": {
                  "description": "Email subject alternative names",
                  "items": {
                    "description": "Normalized string value",
                    "type": "string"
                  },
                  "maxItems": 256,
                  "type": "array"
                },
                "ip_addresses": {
                  "description": "Canonical IP subject alternative names",
                  "items": {
                    "description": "Normalized string value",
                    "type": "string"
                  },
                  "maxItems": 256,
                  "type": "array"
                },
                "uris": {
                  "description": "URI subject alternative names; never fetched",
                  "items": {
                    "description": "Normalized string value",
                    "type": "string"
                  },
                  "maxItems": 256,
                  "type": "array"
                }
              },
              "required": [
                "dns_names",
                "email_addresses",
                "ip_addresses",
                "uris"
              ],
              "type": "object"
            },
            "signature_algorithm": {
              "description": "Parsed CSR self-signature algorithm name",
              "type": "string"
            },
            "signature_valid": {
              "description": "Whether the CSR self-signature verifies under its included key; not an identity or approval result",
              "type": "boolean"
            },
            "subject": {
              "description": "Printable requested subject distinguished name",
              "type": "string"
            },
            "subject_rdns": {
              "description": "Ordered requested subject relative distinguished names",
              "items": {
                "description": "One relative distinguished name set",
                "items": {
                  "additionalProperties": false,
                  "description": "One distinguished-name attribute",
                  "properties": {
                    "name": {
                      "description": "Known stable attribute name or unknown",
                      "type": "string"
                    },
                    "oid": {
                      "description": "Dotted-decimal attribute object identifier",
                      "type": "string"
                    },
                    "value": {
                      "description": "Printable attribute value",
                      "type": "string"
                    }
                  },
                  "required": [
                    "oid",
                    "name",
                    "value"
                  ],
                  "type": "object"
                },
                "maxItems": 32,
                "type": "array"
              },
              "maxItems": 128,
              "type": "array"
            }
          },
          "required": [
            "fingerprint_sha256",
            "subject",
            "subject_rdns",
            "sans",
            "requested_extensions",
            "public_key",
            "signature_algorithm",
            "signature_valid"
          ],
          "type": "object"
        },
        "operation": {
          "const": "csr-inspect",
          "description": "Stable operation name",
          "type": "string"
        },
        "warnings": {
          "description": "Trust and identity limitations",
          "items": {
            "description": "Human-readable warning",
            "type": "string"
          },
          "maxItems": 8,
          "type": "array"
        }
      },
      "required": [
        "operation",
        "algorithm_version",
        "csr",
        "warnings"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}
Example shape — generated from the schema, not a captured live response
{
  "example": {
    "_atlas": {
      "docs": "https://example.com",
      "related": [
        {
          "bridge": "string",
          "docs": "https://example.com",
          "summary": "string",
          "url": "https://example.com"
        }
      ]
    },
    "algorithm_version": "string",
    "csr": {
      "fingerprint_sha256": "string",
      "public_key": {
        "algorithm": "string",
        "bits": 0
      },
      "requested_extensions": [
        {
          "critical": true,
          "oid": "string"
        }
      ],
      "sans": {
        "dns_names": [
          "string"
        ],
        "email_addresses": [
          "string"
        ],
        "ip_addresses": [
          "string"
        ],
        "uris": [
          "string"
        ]
      },
      "signature_algorithm": "string",
      "signature_valid": true,
      "subject": "string",
      "subject_rdns": [
        [
          {
            "name": "string",
            "oid": "string",
            "value": "string"
          }
        ]
      ]
    },
    "operation": "string",
    "warnings": [
      "string"
    ]
  },
  "type": "string"
}

Examples

curl
curl "https://artifact-inspector.use.x402atlas.com/csr"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://artifact-inspector.use.x402atlas.com/csr");
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://artifact-inspector.use.x402atlas.com/csr")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider
artifact-inspector.use.x402atlas.com
Endpoint
https://artifact-inspector.use.x402atlas.com/csr
Machine-readable
/resources/28643.json