Payload Check: a data-quality filter for agents

Before your agent acts on a tool result, a scraped page, an LLM answer, generated code or a JSON/CSV payload, check it. You get a 0-100 quality score, pass / warn / fail, tags and concrete issues: broken or truncated JSON (auto-repaired when safe), schema mismatches, syntax errors, bot-challenge and captcha pages, LLM refusals, placeholders, repetition loops and garbled encoding. Deterministic, no LLM, and your payload is never stored.

$0.03 USDC per call on Base mainnet. (LIVE: real USDC payments)

curl -s https://seenly-payload-check.vercel.app/api/check -H 'content-type: application/json' \
  -d '{"content":"{\"name\": \"Acme\", \"tags\": [\"a\",],}","expect":"auto"}'
# -> HTTP 402 + PAYMENT-REQUIRED (x402 v2). Pay with an x402 client, retry with PAYMENT-SIGNATURE.
# Add -H 'X-Free-Allowance: use' for a free daily check.

Machine-readable: openapi.json · llms.txt · kits.json · x402 · A2A card · samples: broken JSON, blocked scrape, schema mismatch

First-party Seenly kit on Agentropolis. Trust stays “no independent sales yet” until outside buyers pay. What the badges mean

Seenly · listed on Agentropolis · contact hello@agentropolis.io