Blockchain Data · x402
Render a self-contained OpenSCAD model and perform bounded slicer checks
Render a self-contained OpenSCAD model and perform bounded slicer checks
by print.api.williamrobinson.dev · discovered, not yet claimed by its owner · updated 2026-09-11
Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.
What it does
Render a self-contained OpenSCAD model and perform bounded slicer checks
Tags: bazaar · builder-code · eip2612GasSponsoring · erc20ApprovalGasSponsoring · payment-identifier
Use with an agent
- Discover. Agents find this listing with
GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP toolsearch_resources, or/discovery/resources. - Inspect. Fetch
/resources/8219.jsonfor the price and payment options. - Pay. Call
GET https://print.api.williamrobinson.dev/v1/print/validate. The provider answers402with its payment requirements. An x402 client signs one of the options below and retries withPAYMENT-SIGNATURE. - Execute. The provider returns
200with the data. Agent Bazaar is not in the request path and never sees your payment.
For humans
You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.
Pricing & payment
- Price
- $0.05 / request
- Protocol
- x402 v2
- Auth
- No account or API key. Pay per request.
- Networks
- Base
- Uptime
- 1 of the last 1 checks answered
- Calls (30d)
- 5 · 1 unique payers (third-party data from the public x402 Bazaar)
x402 payment requirements
| Scheme | Network | Asset | Amount | Pay to | Timeout |
|---|---|---|---|---|---|
| exact | Base eip155:8453 | USDC | $0.05 | 0x26026370fe8b2bb17af9092a17691c76519366da | 300s |
accepts[] (raw JSON)
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x26026370fe8b2bb17af9092a17691c76519366da",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"amountUsd": 0.05,
"maxTimeoutSeconds": 300
}
]Schemas
Output schema (JSON Schema)
{
"bazaar": {
"info": {
"input": {
"body": {
"maxSizeMm": [
220,
220,
250
],
"parameters": {
"height": 12,
"width": 24
},
"profile": "fdm-pla-0.4",
"source": "width = 20; depth = 30; height = 10; cube([width, depth, height]);"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"artifacts": [
{
"href": "https://example.invalid/v1/print/artifacts/token/report.json",
"mediaType": "application/json",
"name": "report.json",
"sha256": "0000000000000000000000000000000000000000000000000000000000000000",
"sizeBytes": 512
}
],
"checks": [
{
"code": "within_max_size",
"detail": "Model bounds fit the requested maximum size.",
"status": "passed"
}
],
"expiresAt": "2026-01-02T03:04:05.000Z",
"limitations": [
"Slicer output and geometric checks do not prove physical strength or print success."
],
"model": {
"boundsMm": {
"max": [
24,
30,
12
],
"min": [
0,
0,
0
],
"size": [
24,
30,
12
]
},
"triangleCount": 12,
"volumeMm3": 8640,
"watertight": true
},
"parametersApplied": {
"height": 12,
"width": 24
},
"profile": "fdm-pla-0.4",
"recommendations": [],
"status": "passed",
"tools": {
"openscad": "OpenSCAD version 2021.01",
"slicer": "PrusaSlicer 2.6.0"
},
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"maxSizeMm": {
"default": [
220,
220,
250
],
"items": {
"exclusiveMinimum": 0,
"maximum": 1000,
"type": "number"
},
"maxItems": 3,
"minItems": 3,
"type": "array"
},
"parameters": {
"additionalProperties": {
"anyOf": [
{
"description": "Maximum 512 UTF-8 bytes.",
"maxLength": 512,
"type": "string"
},
{
"maximum": 1000000,
"minimum": -1000000,
"type": "number"
},
{
"type": "boolean"
}
]
},
"default": {},
"description": "Overrides must name unique top-level scalar literal assignments, not derived expressions or reserved names.",
"maxProperties": 64,
"propertyNames": {
"pattern": "^[A-Za-z_][A-Za-z0-9_]{0,63}$"
},
"type": "object"
},
"profile": {
"default": "fdm-pla-0.4",
"enum": [
"fdm-pla-0.4",
"fdm-petg-0.4"
],
"type": "string"
},
"source": {
"description": "Self-contained OpenSCAD, interpreted in millimetres; maximum 16 KiB UTF-8 before and after overrides. External imports are prohibited.",
"maxLength": 16384,
"minLength": 1,
"type": "string"
}
},
"required": [
"source"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"artifacts": {
"items": {
"additionalProperties": false,
"properties": {
"href": {
"format": "uri",
"type": "string"
},
"mediaType": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"name": {
"enum": [
"model.scad",
"model.stl",
"model.gcode",
"profile.ini",
"preview.png",
"report.json"
],
"type": "string"
},
"sha256": {
"pattern": "^[a-f0-9]{64}$",
"type": "string"
},
"sizeBytes": {
"minimum": 0,
"type": "integer"
}
},
"required": [
"name",
"mediaType",
"sizeBytes",
"sha256",
"href"
],
"type": "object"
},
"maxItems": 6,
"type": "array"
},
"checks": {
"items": {
"additionalProperties": false,
"properties": {
"code": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"detail": {
"maxLength": 4096,
"type": "string"
},
"status": {
"enum": [
"passed",
"failed",
"not_checked"
],
"type": "string"
}
},
"required": [
"code",
"status",
"detail"
],
"type": "object"
},
"maxItems": 32,
"type": "array"
},
"expiresAt": {
"format": "date-time",
"type": "string"
},
"limitations": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 16,
"type": "array"
},
"model": {
"anyOf": [
{
"type": "null"
},
{
"additionalProperties": false,
"properties": {
"boundsMm": {
"additionalProperties": false,
"properties": {
"max": {
"items": {
"type": "number"
},
"maxItems": 3,
"minItems": 3,
"type": "array"
},
"min": {
"items": {
"type": "number"
},
"maxItems": 3,
"minItems": 3,
"type": "array"
},
"size": {
"items": {
"type": "number"
},
"maxItems": 3,
"minItems": 3,
"type": "array"
}
},
"required": [
"min",
"max",
"size"
],
"type": "object"
},
"triangleCount": {
"minimum": 0,
"type": "integer"
},
"volumeMm3": {
"minimum": 0,
"type": "number"
},
"watertight": {
"type": "boolean"
}
},
"required": [
"triangleCount",
"boundsMm",
"volumeMm3",
"watertight"
],
"type": "object"
}
]
},
"parametersApplied": {
"additionalProperties": {
"anyOf": [
{
"description": "Maximum 512 UTF-8 bytes.",
"maxLength": 512,
"type": "string"
},
{
"maximum": 1000000,
"minimum": -1000000,
"type": "number"
},
{
"type": "boolean"
}
]
},
"default": {},
"description": "Overrides must name unique top-level scalar literal assignments, not derived expressions or reserved names.",
"maxProperties": 64,
"propertyNames": {
"pattern": "^[A-Za-z_][A-Za-z0-9_]{0,63}$"
},
"type": "object"
},
"profile": {
"enum": [
"fdm-pla-0.4",
"fdm-petg-0.4"
],
"type": "string"
},
"recommendations": {
"items": {
"additionalProperties": false,
"properties": {
"code": {
"maxLength": 128,
"type": "string"
},
"message": {
"maxLength": 4096,
"type": "string"
}
},
"required": [
"code",
"message"
],
"type": "object"
},
"maxItems": 32,
"type": "array"
},
"status": {
"enum": [
"passed",
"rejected"
],
"type": "string"
},
"tools": {
"additionalProperties": false,
"properties": {
"openscad": {
"type": "string"
},
"slicer": {
"type": "string"
}
},
"required": [
"openscad",
"slicer"
],
"type": "object"
},
"warnings": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 32,
"type": "array"
}
},
"required": [
"status",
"profile",
"parametersApplied",
"tools",
"model",
"checks",
"warnings",
"recommendations",
"limitations",
"expiresAt",
"artifacts"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"s": [
"cdp_sdk_server"
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {},
"payment-identifier": {
"info": {
"required": true
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Example shape — generated from the schema, not a captured live response
nullExamples
curl
curl "https://print.api.williamrobinson.dev/v1/print/validate"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paidJavaScript
const res = await fetch("https://print.api.williamrobinson.dev/v1/print/validate");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://print.api.williamrobinson.dev/v1/print/validate")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerDetails
- Provider
- print.api.williamrobinson.dev
- Endpoint
- https://print.api.williamrobinson.dev/v1/print/validate
- Machine-readable
/resources/8219.json