Roundhouse AI

PostAgent

Automate AI agent debugging, annotation, and root cause analysis. The complete platform to turn black-box failures into actionable insights and deploy agents with confidence.

InferenceLiveeip155:8453Exactvia cdp
https://postagent-api.interpretai.tech/v1/verify
MailPrintLettersUspsFulfillment
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$45.08
Verified settled volume
18 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4ecc58bb1e8FC25eEfA23f071bd78c98660A007F

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.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x4ecc58bb1e8FC25eEfA23f071bd78c98660A007F",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.postagent.sh/v1/verify",
    "tags": [
      "mail",
      "print",
      "letters",
      "usps",
      "fulfillment"
    ],
    "iconUrl": "https://api.postagent.sh/public/postagent-logo.png",
    "mimeType": "application/json",
    "description": "Verify a postal address for deliverability, paid in USDC. POST a JSON body { \"address\": { \"line1\", \"city\", \"state\", \"zip\", \"country?\" } } with an X-PAYMENT header to get CASS-standardized deliverability (US) or international verification (2-letter non-US country code). Flat price per call; the same request without a payment header returns the 402 challenge.",
    "serviceName": "PostAgent"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "address": {
              "zip": "20500",
              "city": "Washington",
              "line1": "1600 Pennsylvania Ave NW",
              "state": "DC"
            }
          }
        },
        "output": {
          "type": "json",
          "example": {
            "country": "US",
            "payment": {
              "payer": "0x0000000000000000000000000000000000000000",
              "network": "eip155:8453",
              "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000",
              "amountAtomic": "20000"
            },
            "normalized": {
              "zip": "20500-0005",
              "city": "Washington",
              "name": "Jane Doe",
              "line1": "1600 Pennsylvania Ave NW",
              "state": "DC"
            },
            "deliverable": true,
            "deliverability": "deliverable",
            "verificationId": "vrf_8f3c0a2b"
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "address": {
                    "type": "object",
                    "description": "Postal address to verify. US: line1 + (city+state or zip). International: line1 + country (2-letter ISO, non-US) + any known components."
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

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 0x4ecc…A007F. The signed payment is good for 5 minutes.

Paid to
0x4ecc…A007F
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": "0x4ecc58bb1e8FC25eEfA23f071bd78c98660A007F",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "POST",
        "queryParams": {
          "address": {
            "zip": "20500",
            "city": "Washington",
            "line1": "1600 Pennsylvania Ave NW",
            "state": "DC"
          }
        }
      },
      "output": {
        "type": "json",
        "example": {
          "country": "US",
          "payment": {
            "payer": "0x0000000000000000000000000000000000000000",
            "network": "eip155:8453",
            "transaction": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "amountAtomic": "20000"
          },
          "normalized": {
            "zip": "20500-0005",
            "city": "Washington",
            "name": "Jane Doe",
            "line1": "1600 Pennsylvania Ave NW",
            "state": "DC"
          },
          "deliverable": true,
          "deliverability": "deliverable",
          "verificationId": "vrf_8f3c0a2b"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "address": {
                  "type": "object",
                  "description": "Postal address to verify. US: line1 + (city+state or zip). International: line1 + country (2-letter ISO, non-US) + any known components."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-06-11 06:46Z
Last indexed by Roundhouse
2026-06-11 09:30Z
Last enriched (probe, favicon, geo)
2026-09-20 16:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
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

Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. 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 PostAgent 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=PostAgent'
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://postagent-api.interpretai.tech/v1/verify, 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.