Payload Check
Payload Check: data-quality filter for agents. Send any payload (tool/API output, scraped page, LLM answer, generated code, JSON, CSV) and get a 0-100 quality score, pass/warn/fail, tags and concrete issues: invalid or truncated JSON (with auto-repair), JSON Schema mismatches, syntax errors, bot-challenge/captcha/404 scrapes, LLM refusals, placeholders, repetition loops, mojibake. Deterministic, no LLM, payload not stored.
Offering
- Provider
- seenly-payload-check.vercel.app
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Data
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://seenly-payload-check.vercel.app/api/check- MIME type
- application/json
- First seen
- 2026-10-16T01:51:51.176Z
- Last seen
- Tags
- data-quality, Validation, json-repair, scrape-check, guardrails
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.03 USDC
Atomic price: 30000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "30000",
"payTo": "0xeE6239F3E17bEBe5e89F21F29D74D68CAa0d78CE"
}
]Observed health
- Status
- Healthy
- Latest latency
- 104 ms
- Average latency
- 213 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 14 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"bodyType": {
"type": "string",
"enum": [
"json",
"form-data",
"text"
]
},
"body": {
"type": "object",
"properties": {
"content": {
"type": "string",
"description": "The payload to check (max 256 KB): JSON (even broken), code, scraped text or HTML, CSV, an LLM answer. Objects/arrays are accepted and checked as JSON."
},
"expect": {
"type": "string",
"enum": [
"auto",
"json",
"code",
"text",
"html",
"csv"
],
"default": "auto",
"description": "What the payload should be. auto detects it."
},
"language": {
"type": "string",
"description": "Optional code language (javascript, typescript, jsx, tsx get a real parser; python, go, rust, sql, shell get structural checks)."
},
"schema": {
"type": "object",
"description": "Optional JSON Schema (draft-07/2019) the JSON payload must match."
},
"min_chars": {
"type": "integer",
"minimum": 0,
"description": "Optional minimum length for text payloads."
},
"min_score": {
"type": "number",
"minimum": 0,
"maximum": 100,
"default": 80,
"description": "Score at or above which the verdict is pass (fail is always < 45 or any critical issue)."
},
"repair": {
"type": "boolean",
"default": true,
"description": "Try a conservative mechanical repair of broken JSON and return it."
},
"requestKey": {
"type": "string",
"maxLength": 128,
"description": "Optional idempotency key, echoed back."
}
},
"required": [
"content"
],
"additionalProperties": false
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"content": {
"description": "The payload to check (max 256 KB): JSON (even broken), code, scraped text or HTML, CSV, an LLM answer. Objects/arrays are accepted and checked as JSON.",
"type": "string"
},
"expect": {
"default": "auto",
"description": "What the payload should be. auto detects it.",
"enum": [
"auto",
"json",
"code",
"text",
"html",
"csv"
],
"type": "string"
},
"language": {
"description": "Optional code language (javascript, typescript, jsx, tsx get a real parser; python, go, rust, sql, shell get structural checks).",
"type": "string"
},
"min_chars": {
"description": "Optional minimum length for text payloads.",
"minimum": 0,
"type": "integer"
},
"min_score": {
"default": 80,
"description": "Score at or above which the verdict is pass (fail is always < 45 or any critical issue).",
"maximum": 100,
"minimum": 0,
"type": "number"
},
"repair": {
"default": true,
"description": "Try a conservative mechanical repair of broken JSON and return it.",
"type": "boolean"
},
"requestKey": {
"description": "Optional idempotency key, echoed back.",
"maxLength": 128,
"type": "string"
},
"schema": {
"description": "Optional JSON Schema (draft-07/2019) the JSON payload must match.",
"type": "object"
}
},
"required": [
"content"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"action": {
"type": "string"
},
"detected_type": {
"enum": [
"json",
"code",
"text",
"html",
"csv"
],
"type": "string"
},
"issues": {
"items": {
"properties": {
"code": {
"type": "string"
},
"location": {
"type": "string"
},
"message": {
"type": "string"
},
"severity": {
"enum": [
"critical",
"major",
"minor",
"info"
],
"type": "string"
}
},
"type": "object"
},
"type": "array"
},
"quality_score": {
"description": "100 = clean. Critical issue -60, major -25, minor -8.",
"maximum": 100,
"minimum": 0,
"type": "integer"
},
"repaired": {
"description": "Only for broken-but-fixable JSON: content (fixed JSON string), steps[].",
"type": "object"
},
"stats": {
"type": "object"
},
"tags": {
"description": "e.g. invalid_json, truncated, schema_mismatch, scrape_failure, bot_challenge, llm_refusal, placeholder, repetitive, syntax_error, empty, clean",
"items": {
"type": "string"
},
"type": "array"
},
"usable": {
"type": "boolean"
},
"verdict": {
"enum": [
"pass",
"warn",
"fail"
],
"type": "string"
}
},
"required": [
"quality_score",
"verdict",
"usable",
"tags",
"issues"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}