Roundhouse AI

Stack Billing

Voice-first invoicing and time tracking for contractors and freelancers who need to get the invoice done before the next job starts. No setup marathon before the first invoice.

InferenceLiveeip155:8453Exactvia cdp
https://stackbill.app/routes/x402/invoice-from-data
InvoiceInvoice-pdfInvoice-generatorBillingPdf-generation
Calls · 30d
1↓ 22%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 snapshots so far.
$13.06
Verified settled volume
100 settlements proven x402 by their on-chain EIP-3009 marker.
$0.100
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 2026-09-14 14:53Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x1f2A484ef654d49c58c625b09e78B538501D652D

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.

0.1USDC≈ $0.1 USD
on Base · exact scheme

Pay 0.1 USDC on Base to 0x1f2A…D652D. The signed payment is good for 5 minutes.

Paid to
0x1f2A…D652D
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
100000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1f2A484ef654d49c58c625b09e78B538501D652D",
    "amount": "100000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "notes": "Payment due within 30 days.",
          "sender": {
            "name": "Jane Doe Consulting",
            "address": "123 Main St, Springfield, IL 62701"
          },
          "dueDate": "2026-08-01",
          "taxRate": 7.5,
          "currency": "USD",
          "lineItems": [
            {
              "quantity": 10,
              "unitPrice": 95,
              "description": "Backend development"
            },
            {
              "quantity": 2,
              "unitPrice": 120,
              "description": "Code review"
            }
          ],
          "recipient": {
            "name": "Acme Corp",
            "address": "456 Oak Ave, Chicago, IL 60601"
          },
          "invoiceNumber": "INV-2026-042"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "note": "application/pdf — the finished invoice document"
        }
      }
    },
    "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": {
              "required": [
                "recipient",
                "lineItems"
              ],
              "properties": {
                "notes": {
                  "type": "string",
                  "description": "Optional notes printed at the bottom of the invoice"
                },
                "sender": {
                  "type": "object",
                  "required": [
                    "name",
                    "address"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "address": {
                      "type": "string"
                    }
                  },
                  "description": "Who the invoice is from. Optional for activated wallet profiles (send X-StackApps-Token) — the profile's saved name and address are used"
                },
                "dueDate": {
                  "type": "string",
                  "description": "Optional due date, YYYY-MM-DD"
                },
                "taxRate": {
                  "type": "number",
                  "minimum": 0,
                  "description": "Optional tax percent applied to the subtotal (e.g. 7.5)"
                },
                "currency": {
                  "type": "string",
                  "description": "Optional; must be \"USD\" if present (v1 renders USD only)"
                },
                "template": {
                  "enum": [
                    "standard",
                    "legal",
                    "creative"
                  ],
                  "type": "string",
                  "description": "Optional PDF layout (default standard): legal = billing statement with a per-line Date column (populated when descriptions start with 'Work session on YYYY-MM-DD: '); creative = service/fee layout without hours-rate columns (service name taken from the text before ': ' in each description)"
                },
                "lineItems": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "description",
                      "quantity",
                      "unitPrice"
                    ],
                    "properties": {
                      "quantity": {
                        "type": "number",
                        "exclusiveMinimum": 0
                      },
                      "unitPrice": {
                        "type": "number",
                        "minimum": 0
                      },
                      "description": {
                        "type": "string"
                      }
                    }
                  },
                  "description": "At least one line item; amount per line, subtotal, tax and total are computed server-side"
                },
                "recipient": {
                  "type": "object",
                  "required": [
                    "name",
                    "address"
                  ],
                  "properties": {
                    "name": {
                      "type": "string"
                    },
                    "address": {
                      "type": "string"
                    }
                  },
                  "description": "Who the invoice is billed to"
                },
                "invoiceNumber": {
                  "type": "string",
                  "description": "Invoice number printed on the PDF. Optional when the request carries an X-StackApps-Token header from a previous paid call — the next sequential number for that wallet is used and returned in the X-Invoice-Number response header"
                }
              }
            },
            "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"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-14 14:53Z
Last indexed by Roundhouse
2026-09-25 02:50Z
Last enriched (probe, favicon, geo)
2026-09-20 16:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
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. 29 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 Stack Billing 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=Stack%20Billing'
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://stackbill.app/routes/x402/invoice-from-data, 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.