Roundhouse

IntegrityPhase

Ed25519 receipt: registered-app HMAC/format/freshness checks bound to source/operation, not carrier signature or fulfilment proof. EU B2B onboarding, buyer_id, authority, wallet/HMAC source required. https://api.integrityphase.com/.well-known/integrityphase-commerce.json . Buyer quote EUR 20 net + VAT; USDC/Base daily rate. Noncritical EUR 100-200 events. SDK/HTTP/own MCP; paid proxy not offered. 202: durable task, not payment/proof; final funds check before payment. Recovery without repayment.

InfraLiveeip155:8453Exactvia cdp
https://api.integrityphase.com/verify/webhook-integrity
WebhookSigned-proofAudit-trailSupply-chainMro
Calls · 30d
23↑ 91%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$730.63
Verified settled volume
28 settlements proven x402 by their on-chain EIP-3009 marker.
$22.40
Listed price
As published in the catalog. Always read the live 402 before paying.
23
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-25 18:00Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x17301b640f11c3635226ac703118d7ea393a8151

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.

22.396417USDC≈ $22.396417 USD
on Base · exact scheme

Pay 22.396417 USDC on Base to 0x1730…a8151. The signed payment is good for 5 minutes.

Paid to
0x1730…a8151
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
22396417 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x17301b640f11c3635226ac703118d7ea393a8151",
    "amount": "22396417",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "source": {
            "type": "webhook",
            "source_id": "source_example_catalog_0001"
          },
          "payload": {
            "order_id": "EXAMPLE-ORDER-150",
            "event_type": "b2b.order.accepted",
            "example_only": true,
            "event_value_eur": 150
          },
          "buyer_id": "buyer_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
          "event_id": "evt_example_catalog_0001",
          "use_case": "saas_webhook_integrity",
          "method_id": "webhook_integrity.v1",
          "signature": "sha256=dfe5d2e4d91e633de1a854001da721efa959dbab598e742a6d446b5fcc134088",
          "timestamp": "2026-10-11T10:00:00.000Z",
          "confidence": 0.95,
          "schema_version": "integrityphase.verify_webhook_integrity.request.v3",
          "event_value_eur": 150,
          "base_operation_id": "base-operation-example-0001",
          "wallet_address_hash": "sha256:cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc",
          "event_value_currency": "EUR",
          "delegation_fingerprint": "hmac-sha256:dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd",
          "source_operation_fingerprint": "sha256:bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "status": "accepted",
          "buyer_id": "buyer_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
          "next_tool": "operation_status",
          "request_id": "req_example_catalog_0001",
          "operation_id": "autop_000000000000000000000001",
          "retry_payment": false,
          "proof_released": false,
          "retry_after_ms": 1000,
          "schema_version": "integrityphase.deferred_purchase.v1",
          "payment_collected": false
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "required": [
                "schema_version",
                "buyer_id",
                "wallet_address_hash",
                "delegation_fingerprint",
                "base_operation_id",
                "event_id",
                "method_id",
                "event_value_eur",
                "event_value_currency",
                "source_operation_fingerprint",
                "source",
                "payload",
                "timestamp",
                "signature"
              ],
              "properties": {
                "source": {
                  "type": "object",
                  "required": [
                    "source_id",
                    "type"
                  ],
                  "properties": {
                    "type": {
                      "enum": [
                        "webhook",
                        "api"
                      ],
                      "type": "string"
                    },
                    "source_id": {
                      "type": "string",
                      "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{2,127}$",
                      "description": "Identifier of the registered HMAC source bound to this buyer. Source registration is described in the purchase guide."
                    }
                  },
                  "additionalProperties": false
                },
                "payload": {
                  "type": "object",
                  "description": "Event data submitted for verification, for example a B2B order-acceptance message. Preserve the original request data for later proof verification."
                },
                "buyer_id": {
                  "type": "string",
                  "pattern": "^buyer_[a-f0-9]{40}$",
                  "description": "Buyer identifier returned after completed IntegrityPhase onboarding. Use the identifier associated with the purchasing company and authorized wallet."
                },
                "event_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{2,127}$"
                },
                "use_case": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{2,99}$",
                  "maxLength": 100,
                  "minLength": 3
                },
                "method_id": {
                  "const": "webhook_integrity.v1"
                },
                "signature": {
                  "type": "string",
                  "pattern": "^sha256=[a-f0-9]{64}$",
                  "description": "Signature in the supported IntegrityPhase HMAC format, prepared by the authorized application using the documented signing procedure. Supply the signature, never the source secret."
                },
                "timestamp": {
                  "type": "string",
                  "format": "date-time",
                  "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}\\.[0-9]{3}Z$"
                },
                "confidence": {
                  "type": "number",
                  "maximum": 1,
                  "minimum": 0.75
                },
                "schema_version": {
                  "const": "integrityphase.verify_webhook_integrity.request.v3"
                },
                "event_value_eur": {
                  "type": "number",
                  "maximum": 200,
                  "minimum": 100,
                  "multipleOf": 0.01,
                  "description": "Value in EUR of the business event submitted for verification, within the supported EUR 100–200 range. This is not the verification service fee or the USDC payment amount."
                },
                "base_operation_id": {
                  "type": "string",
                  "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{2,127}$"
                },
                "wallet_address_hash": {
                  "type": "string",
                  "pattern": "^sha256:[a-f0-9]{64}$"
                },
                "event_value_currency": {
                  "const": "EUR",
                  "description": "Currency of the business event value. Must be EUR. Payment for the verification service is separately quoted and settled in USDC on Base."
                },
                "delegation_fingerprint": {
                  "type": "string",
                  "pattern": "^hmac-sha256:[a-f0-9]{64}$"
                },
                "source_operation_fingerprint": {
                  "type": "string",
                  "pattern": "^sha256:[a-f0-9]{64}$"
                }
              },
              "additionalProperties": false,
              "x-integrityphase-request-body-max-bytes": 1000000,
              "x-integrityphase-payload-maximum-nesting-depth": 64
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "type": "string",
              "const": "POST"
            },
            "bodyType": {
              "type": "string",
              "const": "json"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "json"
            },
            "example": {
              "type": "object"
            }
          },
          "additionalProperties": false
        }
      },
      "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"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-25 18:00Z
Last indexed by Roundhouse
2026-10-26 07:01Z
Last enriched (probe, favicon, geo)
2026-10-07 19:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 403
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. 18 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 IntegrityPhase 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=IntegrityPhase'
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://api.integrityphase.com/verify/webhook-integrity, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

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