Roundhouse

app.heinrichstech.com

The multi-chain x402 payment gateway for AI agents. 47 paid endpoints. Agents pay USDC or LINK on Base, XRP, RLUSD, or USDC IOU on XRPL, XLM or USDC on Stellar, or native XRP on XRPL EVM Sidechain. Same endpoint, agent picks the chain. No accounts. No API keys. No signup.

OtherLiveeip155:8453Exactvia cdp
https://app.heinrichstech.com/v1/cdp/echo
Calls · 30d
23↓ 12%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.66
Verified settled volume
119 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
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.
18
Unique payers · 30d
Last called 2026-09-22 19:22Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xDa2F35d283c42dd60B965322394bc658a5c1769F

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.

{
  "error": "Payment required: retry with a PAYMENT-SIGNATURE (x402 v2) or X-PAYMENT header",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xDa2F35d283c42dd60B965322394bc658a5c1769F",
      "amount": "1000",
      "scheme": "exact",
      "network": "eip155:8453",
      "resource": "https://app.heinrichstech.com/v1/cdp/echo",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "EDtPHNFA6ofGQZPb8NYUxdTkqVwCfkWJzRCg8vQXkYBL",
      "amount": "1000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "resource": "https://app.heinrichstech.com/v1/cdp/echo",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "524C555344000000000000000000000000000000",
      "extra": {
        "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
        "invoiceId": "38be3578-ea2f-4f41-a456-179911e1e8eb",
        "sourceTag": 804681468
      },
      "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
      "amount": "0.001000",
      "scheme": "exact",
      "network": "xrpl:0",
      "resource": "https://app.heinrichstech.com/v1/cdp/echo",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "5553444300000000000000000000000000000000",
      "extra": {
        "issuer": "rGm7WCVp9gb4jZHWTEtGUr4dd74z2XuWhE",
        "invoiceId": "ffcca33a-f2ec-4a7a-998d-34ab93576727",
        "sourceTag": 804681468
      },
      "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
      "amount": "0.001000",
      "scheme": "exact",
      "network": "xrpl:0",
      "resource": "https://app.heinrichstech.com/v1/cdp/echo",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "USDC",
      "extra": {
        "issuer": "GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
        "currency": "USDC"
      },
      "payTo": "GCB5WZT5VCBBATGMQMTB6TLUXD6KQC6N5ITRWK3CCP4J3YOCE45FA2GO",
      "amount": "10000",
      "scheme": "exact",
      "network": "stellar:pubnet",
      "resource": "https://app.heinrichstech.com/v1/cdp/echo",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://app.heinrichstech.com/v1/cdp/echo",
    "mimeType": "application/json",
    "description": "BitBooth echo endpoint — pays a tiny USDC fee, returns a JSON echo. Reference implementation of the x402 + CDP Facilitator + Bazaar discovery loop."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "message": "hello bitbooth"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "payment": {
              "payer": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
              "network": "eip155:8453",
              "transaction": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
            },
            "service": "BitBooth /v1/cdp/echo",
            "youSent": "hello bitbooth",
            "protocol": "x402 + CDP Facilitator",
            "timestamp": "2026-05-05T12:00:00.000Z"
          }
        }
      },
      "tags": [
        "reference",
        "demo",
        "x402"
      ],
      "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": {
                "properties": {
                  "message": {
                    "type": "string",
                    "maxLength": 500,
                    "description": "Optional string to echo back in the response. Max 500 chars."
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      },
      "category": "utility",
      "discoverable": true
    }
  },
  "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.

0.001USDC≈ $0.001 USD
on Base · exact scheme

Pay 0.001 USDC on Base to 0xDa2F…1769F. The signed payment is good for 2 minutes.

Paid to
0xDa2F…1769F
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
1000 smallest units
1000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
EDtPHN…XkYBL
Token contract
EPjFWd…TDt1v
Payment window
2 minutes
0.001000units
on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
rfryhe…BkUEy
Token contract
524C55…00000
Payment window
2 minutes
0.001000units
on xrpl:0 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
rfryhe…BkUEy
Token contract
555344…00000
Payment window
2 minutes
10000units
on stellar:pubnet · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
GCB5WZ…FA2GO
Token contract
USDC
Payment window
2 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xDa2F35d283c42dd60B965322394bc658a5c1769F",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://app.heinrichstech.com/v1/cdp/echo",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
    },
    "payTo": "EDtPHNFA6ofGQZPb8NYUxdTkqVwCfkWJzRCg8vQXkYBL",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "resource": "https://app.heinrichstech.com/v1/cdp/echo",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "524C555344000000000000000000000000000000",
    "extra": {
      "issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
      "invoiceId": "2af76466-14ac-47eb-b2b4-5393e1f3a33b",
      "sourceTag": 804681468
    },
    "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
    "amount": "0.001000",
    "scheme": "exact",
    "network": "xrpl:0",
    "resource": "https://app.heinrichstech.com/v1/cdp/echo",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "5553444300000000000000000000000000000000",
    "extra": {
      "issuer": "rGm7WCVp9gb4jZHWTEtGUr4dd74z2XuWhE",
      "invoiceId": "c4a1c47c-b7aa-44b5-8b1d-e95c5acffb62",
      "sourceTag": 804681468
    },
    "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
    "amount": "0.001000",
    "scheme": "exact",
    "network": "xrpl:0",
    "resource": "https://app.heinrichstech.com/v1/cdp/echo",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "USDC",
    "extra": {
      "issuer": "GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN",
      "currency": "USDC"
    },
    "payTo": "GCB5WZT5VCBBATGMQMTB6TLUXD6KQC6N5ITRWK3CCP4J3YOCE45FA2GO",
    "amount": "10000",
    "scheme": "exact",
    "network": "stellar:pubnet",
    "resource": "https://app.heinrichstech.com/v1/cdp/echo",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "message": "hello bitbooth"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "payment": {
            "payer": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
            "network": "eip155:8453",
            "transaction": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
          },
          "service": "BitBooth /v1/cdp/echo",
          "youSent": "hello bitbooth",
          "protocol": "x402 + CDP Facilitator",
          "timestamp": "2026-05-05T12:00:00.000Z"
        }
      }
    },
    "tags": [
      "reference",
      "demo",
      "x402"
    ],
    "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": {
              "properties": {
                "message": {
                  "type": "string",
                  "maxLength": 500,
                  "description": "Optional string to echo back in the response. Max 500 chars."
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "category": "utility",
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-09-22 19:22Z
Last indexed by Roundhouse
2026-09-24 08:40Z
Last enriched (probe, favicon, geo)
2026-09-13 11:15Z
x402 version
2
Max timeout
120s
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

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 app.heinrichstech.com 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=app.heinrichstech.com'
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://app.heinrichstech.com/v1/cdp/echo, 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.