Roundhouse

Exende Retry

Agent-native infrastructure APIs accessed directly over HTTP and paid per request using x402.

OtherLiveeip155:8453Exactvia cdp
https://retry.exende.dev/v1/retries
HttpRetriesDurabilityAgents
Calls · 30d
1↓ 9.5%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.30
Verified settled volume
15 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-25 21:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9d2526Fa73fcb300B78075c4446Ec0B306f1a3f9

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x9d25…1a3f9. The signed payment is good for 5 minutes.

Paid to
0x9d25…1a3f9
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x9d2526Fa73fcb300B78075c4446Ec0B306f1a3f9",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

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

Provenance

Seen in the source catalog
2026-08-25 21:24Z
Last indexed by Roundhouse
2026-09-24 07:20Z
Last enriched (probe, favicon, geo)
2026-09-23 20:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 200
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Exende Retry and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Exende%20Retry'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://retry.exende.dev/v1/retries, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.