All projects on Base matching “check”

Independently verify an agent's output before you pay: an invoice or any deliverable, checked against your JSON Schema and rules like sums matching totals. Pass/fail, % passed, fix hints and a signed receipt. $0.02 USDC, no signup, x402 v2.

Crypto Market Data Integrity Attestation for agents and trading systems. Validate caller-supplied crypto market observations for causal timing, freshness, gaps, sequencing, identity consistency, and cryptographic record hashes. Returns deterministic PASS/FAIL, safe_to_use, named checks, and attestation identity. Use before analytics, research, or trading workflows. No market data acquisition or re

Check a public URL for meaningful changes and freshness.

Call before publishing a claim that cites EU law. Checks that the cited instrument exists in our pinned corpus, that the cited article exists within it, and whether your quoted text actually appears in that article. Covers the AI Act, GDPR, NIS2, DORA and the Cyber Resilience Act. Returns the official article text with a EUR-Lex link. Citation verification only: it never gives legal advice or clas

Is Stripe or another SaaS or cloud vendor down right now? Input: ?vendor=stripe (slug, name or domain). Returns status, confidence, active incidents with a summary, official status page, last-checked time and a staleness flag, read live from 60SecMonitor. $0.01 USDC on Base. Untracked vendors return 404 and aren't charged. Up to 25 vendors at once: /v1/status/batch ($0.05). Past incidents: /v1/inc

Performs comprehensive URL health checks, measuring response time, status code, security headers, and TLS/SSL certificate validity. Route: GET /paid/health-check?url=https://example.com. Ideal for automated monitoring and endpoint auditing.

Multi-source token due diligence — same aggregation as token-report (security checks, market data, liquidity analysis from 4+ sources) with weighted 0-100 risk scoring and red/green flags. No AI verdict prose — structured score only. For AI-synthesized rationale and recommendations, see /intel/token-report ($0.50). Accepts USDC payments on Base and Solana

Buy the right paid API for your agent in one call: say what you need ("weather forecast Amsterdam tomorrow", "BTC price", "search the web for x402"). Fizzl picks the x402 service x402 Doctor has seen paying out day after day at a fair price, fills in its input, buys it (up to $0.01) and returns the answer, checked by TypeSafe Jev, with a signed receipt. Nothing is charged when no service delivers.

Use when an agent has the text of a Japanese invoice or receipt (e.g. OCR output) and needs exact amounts without LLM misreads. Returns registration number (T+13, check digit only, not an NTA registry lookup), total, subtotal, 8%/10% tax breakdown and issue/due dates (Reiwa to ISO). Deterministic rules; text only, no images/PDF. Errors before payment (no charge): 400 body not {text} or over 5000 c

Checks whether a website or web address is currently reachable and reports how fast it responded.

Call before an agent runs npm install. Checks one npm package against the registry, OSV advisories, install scripts, typosquat and combosquat names and repository provenance, and flags hallucinated or slopsquatted names. Answers safe, caution, block or does_not_exist; every reason is sourced and labelled fact or heuristic.

Retrieve a fixed English editorial reference for offset-printing review. It covers job records, material questions, registration and sample checks, process limits, and provenance. The response is reference material, not a production inspection or authorization.

Find local businesses by city and category. Returns name, phone, address and verified website status (live/broken/none, https, last-checked date). 0.05 USDC per query.

Website audit for AI agents: one URL in, one structured JSON report out, 69 checks with stable issue codes and exact fixes.

Independent website QA and pre-handover verification for AI agents. Submit one public website URL. Atinamos loads the real site in desktop and mobile Chromium, checks HTTP and browser failures, failed requests, console errors and warnings, captures screenshots, and returns machine-readable evidence. Poll the returned status_url for results.

KYA / counterparty check for a wallet (and optional name): OFAC + wallet risk + signed verdict

Checks how well a Shopify store's products show up when AI shopping assistants such as ChatGPT, Gemini, Perplexity, Grok, and Copilot search for products, and reports the store's rank and its closest competitors. Searches Shopify's real Global Catalog - the same product index AI assistants read from.

Use Check for a changed/unchanged signal and optional compact text diff. Exactly one URL or existing watch ID; URL plus rules can create a watch, whereas watch_id reuses saved rules and forbids overrides. Use Smart Diff for structured changes. On-demand only; x402 $0.005 USDC on Base, including cache hits.

Risk check for an EVM contract/token address

South African SA ID number validation: Structural validation of a South African identity number with safe decode: Luhn check digit, birth date, gender and citizenship segments (citizen or permanent resident). The structural step in KYC, KYB and customer onboarding or due diligence workflows: derive date of birth, age, gender and citizenship without storing the identity. Run it before a paid regist

Package security scanner — CVEs, license check, typosquat detection.

Preflight x402 scam check: endpoint risk before you pay — decoy / zombie / price-trap / never-paid? Trust verdict in ~200ms before PAYMENT-SIGNATURE.

AQL PropertyCheck full report for one City of Gold Coast or Brisbane City address: the property and what surrounds it, with source and status where supplied by the result. Coverage is checked before any charge. Not a valuation.

Run ONE named check against a response you paste

Pre-sign risk check: decodes a transaction, typed data or sign request and flags risky approvals, permits, blind signing and drainer patterns. Run by Joi, an AI agent.

Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written sums, totals, percentages, dates, weekdays, time spans, unit conversions, and list counts; checks lengths the task asks for; flags placeholders and prompt injection; measures words, items, and JSON shape. Signed receipt, tier lite. For every requireme

Real-time SEC 8-K material-event alert with stock ticker: ticker, exchange, company, CIK, event, severity, EDGAR link. id=latest (optional ?severity=critical) or an accession number from free GET /filings. Not charged if no match. Items: 1.03 bankruptcy, 1.05 cyber incident, 4.02 restatement, 2.04 debt acceleration, 2.06 impairment, 3.01 delisting, 4.01 auditor change, 5.02 exec departure. Checked

Audit supplied HTML for metadata, canonical URLs, indexability directives, headings, image alternatives, form labels, link names, social metadata and JSON-LD validity. Returns evidence and practical fixes. Static checks are not a full WCAG certification or ranking guarantee.

Discover newly surfaced meme tokens on Solana from DexScreener boosted (PAID-promoted) and newly profiled tokens, enriched with price, liquidity, volume. Discovery starting point; check /api/safety, /api/holders, /api/bundle before trading. Body: { limit? }.

Verify a JSON Web Token's signature and claims against a shared secret (HS*) or a PEM public key (RS/ES/PS). Returns { valid, payload } on success or { valid: false, reason } for a bad signature, expired/not-yet-active token, or a failed issuer/audience/subject check. Pass `algorithms` to pin the accepted signing algorithms and prevent algorithm-confusion attacks.