Blockchain Data · x402

Execute HTTPS requests reliably with automatic retries for rate limits, temporary serve…

Name: Execute HTTPS requests reliably with automatic retries for rate limits, temporary server f
Price: 0.02 USD
Availability: InStock

Execute HTTPS requests reliably with automatic retries for rate limits, temporary server failures, network errors and timeouts. One $0.02 USDC payment creates one durable job with up to 8 attempts and a 24 hour lifetime.

by retry.exende.dev · discovered, not yet claimed by its owner · updated 2026-08-25

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

Tags: bazaar · builder-code · eip2612GasSponsoring · erc20ApprovalGasSponsoring · payment-identifier

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/8481.json for the price and payment options.
Pay. Call GET https://retry.exende.dev/v1/retries. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
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, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.02 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Uptime: 1 of the last 1 checks answered
Calls (30d): 3 · 2 unique payers (third-party data from the public x402 Bazaar)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.02	0x9d2526Fa73fcb300B78075c4446Ec0B306f1a3f9	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x9d2526Fa73fcb300B78075c4446Ec0B306f1a3f9",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "callback_secret": "client-generated-secret-with-at-least-32-characters",
          "callback_url": "https://agent.example.com/retry-complete",
          "request": {
            "headers": {},
            "method": "GET",
            "url": "https://api.example.com/data"
          },
          "retry": {
            "initial_delay_seconds": 5,
            "max_attempts": 8,
            "max_delay_seconds": 300,
            "strategy": "exponential"
          }
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "attempts": 0,
          "created_at": "2026-08-24T12:00:00.000Z",
          "id": "retry_0123456789abcdef0123456789abcdef",
          "max_attempts": 8,
          "next_attempt_at": "2026-08-24T12:00:00.000Z",
          "read_token": "ex_retry_read_REDACTED",
          "status": "pending",
          "status_url": "https://retry.exende.dev/v1/retries/retry_0123456789abcdef0123456789abcdef"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "callback_secret": {
                  "description": "Client-generated HMAC-SHA256 secret. Required with callback_url, encrypted at rest, and never returned.",
                  "maxLength": 512,
                  "minLength": 32,
                  "type": "string"
                },
                "callback_url": {
                  "description": "Optional HTTPS endpoint for one signed terminal callback delivery workflow. Requires callback_secret.",
                  "format": "uri",
                  "type": "string"
                },
                "request": {
                  "additionalProperties": false,
                  "properties": {
                    "body": {
                      "description": "Optional JSON-compatible outbound request body. GET bodies are not accepted."
                    },
                    "headers": {
                      "additionalProperties": {
                        "type": "string"
                      },
                      "maxProperties": 32,
                      "type": "object"
                    },
                    "method": {
                      "enum": [
                        "GET",
                        "POST",
                        "PUT",
                        "PATCH",
                        "DELETE"
                      ],
                      "type": "string"
                    },
                    "url": {
                      "description": "Public HTTPS destination for the durable request.",
                      "format": "uri",
                      "type": "string"
                    }
                  },
                  "required": [
                    "method",
                    "url"
                  ],
                  "type": "object"
                },
                "retry": {
                  "additionalProperties": false,
                  "properties": {
                    "initial_delay_seconds": {
                      "default": 5,
                      "maximum": 3600,
                      "minimum": 2,
                      "type": "integer"
                    },
                    "max_attempts": {
                      "default": 8,
                      "description": "Included outbound attempts for the $0.02 paid job.",
                      "maximum": 8,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "max_delay_seconds": {
                      "default": 300,
                      "maximum": 3600,
                      "minimum": 2,
                      "type": "integer"
                    },
                    "strategy": {
                      "default": "exponential",
                      "enum": [
                        "fixed",
                        "exponential"
                      ],
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "retry_status_codes": {
                  "items": {
                    "maximum": 599,
                    "minimum": 100,
                    "type": "integer"
                  },
                  "maxItems": 100,
                  "type": "array"
                },
                "success_codes": {
                  "items": {
                    "maximum": 599,
                    "minimum": 100,
                    "type": "integer"
                  },
                  "maxItems": 100,
                  "minItems": 1,
                  "type": "array"
                }
              },
              "required": [
                "request"
              ],
              "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"
        },
        "output": {
          "properties": {
            "example": {
              "additionalProperties": false,
              "properties": {
                "attempts": {
                  "const": 0,
                  "type": "integer"
                },
                "created_at": {
                  "format": "date-time",
                  "type": "string"
                },
                "id": {
                  "pattern": "^retry_[a-f0-9]{32}$",
                  "type": "string"
                },
                "max_attempts": {
                  "maximum": 8,
                  "minimum": 1,
                  "type": "integer"
                },
                "next_attempt_at": {
                  "format": "date-time",
                  "type": "string"
                },
                "read_token": {
                  "description": "Bearer capability for status and attempt history. Treat as secret.",
                  "type": "string"
                },
                "status": {
                  "const": "pending",
                  "type": "string"
                },
                "status_url": {
                  "format": "uri",
                  "type": "string"
                }
              },
              "required": [
                "id",
                "status",
                "attempts",
                "max_attempts",
                "created_at",
                "next_attempt_at",
                "status_url",
                "read_token"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "builder-code": {
    "info": {
      "a": "exende_retry",
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "additionalProperties": false,
      "properties": {
        "a": {
          "description": "App builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        },
        "s": {
          "description": "Service builder codes",
          "items": {
            "pattern": "^[a-z0-9_]{1,32}$",
            "type": "string"
          },
          "maxItems": 11,
          "type": "array"
        },
        "w": {
          "description": "Wallet builder code",
          "pattern": "^[a-z0-9_]{1,32}$",
          "type": "string"
        }
      },
      "type": "object"
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {},
  "payment-identifier": {
    "info": {
      "required": true
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "id": {
          "maxLength": 128,
          "minLength": 16,
          "pattern": "^[a-zA-Z0-9_-]+$",
          "type": "string"
        },
        "required": {
          "type": "boolean"
        }
      },
      "required": [
        "required"
      ],
      "type": "object"
    }
  }
}

Example shape — generated from the schema, not a captured live response

null

Examples

curl

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

JavaScript

const res = await fetch("https://retry.exende.dev/v1/retries");
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://retry.exende.dev/v1/retries")
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: retry.exende.dev
Endpoint: https://retry.exende.dev/v1/retries
Machine-readable: /resources/8481.json