naifgravity-com X402 API
The X402 API from naifgravity-com — 4 operation(s) for x402.
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OpenAPI Specification
openapi: 3.2.0
info:
title: NAIF Gravity — Paid Developer Tools X402 API
version: 1.0.0
description: 'Four deterministic developer tools: JSON Validity Check ($1), API Response Shape Check ($2), JSON Normalize Mini ($3), CSV Schema Audit Mini ($5). Base Mainnet USDC via x402 v2. Availability follows regional payment policy, and only paid settlement releases results.'
contact:
url: https://naifgravity.com
x-guidance: 'Use POST /api/x402/json-validity-check with application/json and a jsonText string containing at most 4096 UTF-8 bytes. Never include tokens, passwords, private keys or customer records. Read the HTTP 402 Payment-Required challenge before authorizing a purchase; this route charges 1 USDC on Base (eip155:8453). Use an x402 v2 capable client for signed payment authorization. A challenge or listing is not proof of payment: the paid result is released only after verification and settlement. VALID, REPAIRED_SAFE_PATTERN and INVALID are bounded diagnostic outcomes; inferred schemas describe the supplied sample only. Saudi visitors use the store Apple Pay path; wallet availability follows the live regional policy.'
servers:
- url: https://naifgravity.com
tags:
- name: X402
paths:
/api/x402/json-validity-check:
post:
operationId: checkJsonValidity
summary: Validate one bounded JSON sample
description: Send jsonText containing at most 4096 UTF-8 bytes. x402 authorization and settlement are required before a paid result. Invalid JSON receives a diagnosis; safe repair is limited to supported trailing-comma patterns.
x-payment-info:
price:
mode: fixed
currency: USD
amount: '1.00'
protocols:
- x402: {}
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
jsonText:
type: string
maxLength: 4096
description: Sanitized sample, maximum 4096 UTF-8 bytes.
required:
- jsonText
additionalProperties: false
example:
jsonText: '{"ok":true}'
responses:
'200':
description: Paid bounded JSON diagnosis
content:
application/json:
schema:
type: object
description: One-sample JSON result. INVALID is a diagnosis, not a successful repair.
properties:
productId:
const: json-validity-check
kind:
const: json_actionable_artifact
status:
type: string
enum:
- VALID
- REPAIRED_SAFE_PATTERN
- INVALID
repairApplied:
type: string
enum:
- none
- trailing_comma_removed
correctedJson:
type:
- string
- 'null'
description: Canonical JSON; null for invalid input.
inferredSchema:
type:
- object
- 'null'
description: Schema inferred from this sample, not the full external contract.
schemaNote:
type: string
validExample: {}
parseError:
type: string
validationTest:
type:
- object
- 'null'
properties:
kind:
const: deterministic_round_trip
runtime:
const: javascript
code:
type: string
expected:
const: PASS
roundTripEqual:
type: boolean
topLevelType:
enum:
- object
- array
- string
- integer
- number
- boolean
- 'null'
sha256:
type: string
pattern: ^[0-9a-f]{64}$
remainingScope:
type: array
items:
type: string
rawInputStored:
const: false
heavyWork:
const: false
required:
- productId
- kind
- status
- correctedJson
- inferredSchema
- validExample
- validationTest
- rawInputStored
- heavyWork
additionalProperties: true
example:
productId: json-validity-check
kind: json_actionable_artifact
status: VALID
repairApplied: none
correctedJson: '{"ok":true}'
inferredSchema:
$schema: https://json-schema.org/draft/2020-12/schema
type: object
properties:
ok:
type: boolean
required:
- ok
additionalProperties: true
schemaNote: Schema is inferred from the supplied sample; it is not a claim about the full external contract.
validExample:
ok: true
validationTest:
kind: deterministic_round_trip
runtime: javascript
code: const v=JSON.parse("{\"ok\":true}"); if(JSON.stringify(v)!=="{\"ok\":true}") throw new Error("ROUND_TRIP_MISMATCH"); console.log("PASS");
expected: PASS
roundTripEqual: true
topLevelType: object
sha256: 4062edaf750fb8074e7e83e0c9028c94e32468a8b6f1614774328ef045150f93
remainingScope:
- Cross-file contract validation
- External API/MCP compatibility
- CI integration are outside this free bounded check
rawInputStored: false
heavyWork: false
'400':
description: Invalid request.
'402':
description: x402 payment required; amount 1000000 atomic USDC units on Base.
headers:
Payment-Required:
description: Base64 encoded x402 v2 challenge.
schema:
type: string
'404':
description: Not available for this regional payment policy.
'413':
description: Sample exceeds bounded size.
'503':
description: Payment adapter unavailable.
tags:
- X402
/api/x402/api-response-shape-check:
post:
operationId: inspectApiResponseShape
summary: Analyze a bounded JSON API response sample
description: 'Inspect one valid JSON response sample: field/type map, structure and consistency notes. No external endpoint is accessed.'
x-payment-info:
price:
mode: fixed
currency: USD
amount: '2.00'
protocols:
- x402: {}
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
responseText:
type: string
maxLength: 4096
description: Sanitized bounded input, maximum 4096 UTF-8 bytes
expectedKeys:
type: array
maxItems: 16
items:
type: string
maxLength: 80
required:
- responseText
additionalProperties: false
example:
responseText: '{"ok":true,"items":[{"id":7}]}'
responses:
'200':
description: Bounded paid result, released after verification and settlement
content:
application/json:
schema:
type: object
required:
- productId
- status
properties:
productId:
const: api-response-shape-check
status:
type: string
additionalProperties: true
'400':
description: Input invalid or unsupported before payment.
'402':
description: 'x402 v2 payment required: Base USDC; read Payment-Required header before signing.'
headers:
Payment-Required:
description: Base64-encoded x402 v2 challenge.
schema:
type: string
'404':
description: Not available under the current geographic payment policy.
'413':
description: Input exceeds 4096 UTF-8 bytes.
tags:
- X402
/api/x402/json-normalizer:
post:
operationId: normalizeJsonMini
summary: Normalize and checksum a small JSON sample
description: Sort nested JSON object keys and return canonical JSON, round-trip QA and a SHA-256 receipt.
x-payment-info:
price:
mode: fixed
currency: USD
amount: '3.00'
protocols:
- x402: {}
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
jsonText:
type: string
maxLength: 4096
description: Sanitized bounded input, maximum 4096 UTF-8 bytes
required:
- jsonText
additionalProperties: false
example:
jsonText: '{"z":2,"a":1}'
responses:
'200':
description: Bounded paid result, released after verification and settlement
content:
application/json:
schema:
type: object
required:
- productId
- status
properties:
productId:
const: json-normalizer
status:
type: string
additionalProperties: true
'400':
description: Input invalid or unsupported before payment.
'402':
description: 'x402 v2 payment required: Base USDC; read Payment-Required header before signing.'
headers:
Payment-Required:
description: Base64-encoded x402 v2 challenge.
schema:
type: string
'404':
description: Not available under the current geographic payment policy.
'413':
description: Input exceeds 4096 UTF-8 bytes.
tags:
- X402
/api/x402/csv-schema-audit:
post:
operationId: auditCsvSchemaMini
summary: Audit a small CSV schema sample
description: Inspect CSV fields/rows and return a normalized sample, schema QA and SHA-256 receipt.
x-payment-info:
price:
mode: fixed
currency: USD
amount: '5.00'
protocols:
- x402: {}
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
csvText:
type: string
maxLength: 4096
description: Sanitized bounded input, maximum 4096 UTF-8 bytes
required:
- csvText
additionalProperties: false
example:
csvText: 'id,name
1,Ada'
responses:
'200':
description: Bounded paid result, released after verification and settlement
content:
application/json:
schema:
type: object
required:
- productId
- status
properties:
productId:
const: csv-schema-audit
status:
type: string
additionalProperties: true
'400':
description: Input invalid or unsupported before payment.
'402':
description: 'x402 v2 payment required: Base USDC; read Payment-Required header before signing.'
headers:
Payment-Required:
description: Base64-encoded x402 v2 challenge.
schema:
type: string
'404':
description: Not available under the current geographic payment policy.
'413':
description: Input exceeds 4096 UTF-8 bytes.
tags:
- X402
x-service-info:
name: NAIF Gravity
description: 'NAIF Gravity JSON Validity Check: validate JSON from AI agents, API responses or automation workflows. For samples up to 4096 UTF-8 bytes, get a validity diagnosis, safe trailing-comma repair when applicable, canonical JSON, a sample-inferred JSON Schema and a JavaScript round-trip test. Malformed samples return a diagnosis. $1 USDC per call on Base.'
iconUrl: https://naifgravity.com/naif-gravity-logo.png