CSV Preflight Validator

x402

CSV Preflight Validator is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Validates a CSV HTTP endpoint before payment by checking column and row counts and reporting any flags

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

Output

Returns a JSON object with: ok (boolean indicating success), cols (number of columns in the CSV), rows (number of rows in the CSV), and flags (an array of any warning or error flags detected in the response).

Example use cases

Pre-payment CSV structure check

“I want to use a CSV data endpoint but don't want to waste money if it's broken — can you run a GET preflight on it and tell me the column count, row count, and any flags before I commit to paying?”

Pipeline data shape validation

“Before I wire this CSV source into my data pipeline, can you preflight it with a GET request to confirm it's returning the expected number of columns and rows without any error flags?”

Diagnosing a suspect CSV route

“I think one of my CSV API routes might be returning bad data — can you do a preflight GET check on it and let me know if there are any flags or if the row and column counts look off?”

Technical details

Endpoint

GEThttps://anibalb.duckdns.org/x402/csv-preflight?utm_source=zero.xyz

When to prefer

Use this endpoint when you need to validate the structure and health of a CSV-returning HTTP endpoint before making a paid call. It is especially useful in x402 pay-per-call workflows where you want to avoid wasting USDC on broken or unexpected data sources. Prefer this over blind calls when building data pipelines or when integrating an unfamiliar CSV API.

Side effects

Invalid or unsupported HTTP method returns validation error
Endpoint unreachable results in network or timeout error
CSV endpoint returns malformed data causing parsing failure
Missing required 'type' or 'method' fields in input returns schema error
Flags array may contain warnings even when ok is true

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "cols": 2,
    "rows": 2,
    "flags": []
  }
}

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