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Every pay-per-call x402 API we can find, ranked by what agents actually pay for. No accounts, no API keys.
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225 results- BBIMI CheckerDeveloper tools
Checks one or more domains to see whether they are set up to show a brand logo next to emails in Gmail, Apple Mail, and Yahoo. It looks up the BIMI settings the domain has published, checks the logo file follows the required format, checks any logo certificate is valid and unexpired, and confirms the domain has strict enough email protection turned on. Returns a clear pass or fail per domain, plus
BaseSolanabimi-checker.underscoredone.comfrom $0.011 endpoint - Xx402-v2-mint-whois-rdap.vercel.appDeveloper tools
Domain RDAP via IANA DNS bootstrap. Registrar/NS/status/events. SSRF-safe.
Basex402-v2-mint-whois-rdap.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-safe-math.vercel.appDeveloper tools
Exact decimal/rational math with optional units + step trace. AST-sandboxed (no eval).
Basex402-v2-mint-safe-math.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-pii-redact.vercel.appDeveloper tools
Deterministic PII redaction: emails, phones, SSN-shaped, Luhn cards, IPv4 → typed placeholders. No network. Amp port.
Basex402-v2-mint-pii-redact.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-epoch-convert.vercel.appDeveloper tools
Epoch s/ms/us/ns or ISO-8601 ↔ epoch_s/ms + ISO UTC + any IANA tz. Offline. Amp port.
Basex402-v2-mint-epoch-convert.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-email-deliverability.vercel.appDeveloper tools
Email deliverability (MX/SPF/DMARC via DoH). No SMTP mailbox probe. No charge on empty/failed.
Basex402-v2-mint-email-deliverability.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-dns-lookup.vercel.appDeveloper tools
DNS via Cloudflare/Google DoH: A/AAAA/MX/TXT/NS/CAA + optional SPF/DMARC parse. No mailbox probing.
Basex402-v2-mint-dns-lookup.vercel.appfrom $0.0031 endpoint - Xx402-v2-mint-date-time-toolkit.vercel.appDeveloper tools
Relative date parse, ISO 8601 duration math, IANA timezone convert with DST flags. Offline tzdata.
Basex402-v2-mint-date-time-toolkit.vercel.appfrom $0.0021 endpoint - Xx402-v2-mint-cron-next.vercel.appDeveloper tools
Next 1-20 run times for a 5-field cron expression (IANA tz, DST-aware). Offline. Amp port.
Basex402-v2-mint-cron-next.vercel.appfrom $0.00311 endpoint - PPaidPilot Invoice APIDeveloper tools
Turn invoice JSON into a print-ready PDF. Input (JSON body): seller, buyer, invoice_number, issue_date, line_items[{description,quantity,unit_price}], optional due_date, currency, tax_rate, discount, notes, payment_instructions. Returns application/pdf bytes, multi-page if needed. Totals, tax and discount are computed server-side; the X-Invoice-Total header carries the total. 12 currencies. $0.02
Basepaidpilot-invoice-api.dario-9fa.workers.devfrom $0.021 endpoint - Ffalcon.sol docsDeveloper tools
falcon.sol: Full document extraction (all pages) for invoices, receipts, POs, W-9s and generic PDFs. $0.03 USDC.
SolanaBasefalcondocs.vercel.appfrom $0.00254 endpoints - Nnonprofit-verify.iykykblog.workers.devDeveloper tools
Verify a US nonprofit by EIN: tax-exempt status, legal name, ruling date, deductibility code, NTEE activity code, and automatic-revocation flag. Public-domain IRS data.
Basenonprofit-verify.iykykblog.workers.devfrom $0.051 endpoint - Ddrug-shortage-check.iykykblog.workers.devDeveloper tools
Check whether a drug is currently in shortage in the FDA Drug Shortages Database, by generic/brand name or NDC. Returns the FDA status (Currently in Shortage / Resolved / To Be Discontinued), affected presentations, availability, FDA-published shortage reason, and posting dates. Public-domain FDA data via openFDA.
Basedrug-shortage-check.iykykblog.workers.devfrom $0.051 endpoint - SShopperPulseDeveloper tools
Know Your Merchant (KYM) trust score: pass a merchant domain and get a deterministic 0-100 trust score with a band (high/medium/low/very_low/avoid) and human-readable reasons. Live signals: domain age from the RDAP registry of record, malware/phishing blocklist verdict via Cloudflare Security DNS, TLS certificate health, mail capability, and refund/privacy/contact page presence. The merchant-side
BaseSolanaPolygon+8shopperpulse.theaslangroupllc.comfrom $0.012 endpoints - EEncode JSON to MessagePack/CBORDeveloper tools
Serialize a JSON value into a compact MessagePack or CBOR byte stream, returned as a base64 (default), base64url or hex string, along with the byte length.
Basepack.openverbs.comfrom $0.0042 endpoints - EEuler's totientDeveloper tools
Least common multiple of two or more positive integers (arbitrary precision).
Basenumtheory.openverbs.comfrom $0.0045 endpoints - DDomain Age CheckerDeveloper tools
Send a list of domain names and this tool tells you exactly how old each one is, when it was first registered, when it expires, and how much time is left before expiration. Great for spotting brand-new suspicious domains, researching competitors, or evaluating domains before buying or linking to them. Works with over 100 domain extensions worldwide.
BaseSolanadomain-age-checker.underscoredone.comfrom $0.012 endpoints - BBulk DMARC Record LookupDeveloper tools
Give this tool a list of domain names and it will instantly check each one's DMARC email security record. DMARC is a standard that tells email providers how to handle fake or spoofed emails pretending to come from your domain. For each domain you submit, you get back whether a valid record exists, what the policy is (none, quarantine, or reject), whether reporting addresses are set up, and the ful
BaseSolanadmarc-lookup.underscoredone.comfrom $0.011 endpoint - Ddealdocs.genexxis.comDeveloper tools
Red-flag review of a long deal document (SHA, SPA with schedules, full term sheet pack). Pro tier: up to 100 PDF pages / 5 MB / 400k characters, longer output. Long jobs return a free poll URL. Documents are not stored.
Basedealdocs.genexxis.comfrom $0.0055 endpoints - Ffiles.camelai.ioDeveloper tools
Upload a file and get a temporary signed URL. Send raw file body with Content-Type header. Returns a URL valid for 1 hour.
BasePolygonSolanafiles.camelai.iofrom $0.0011 endpoint - Bbitcoind.appDeveloper tools
Complete list of all Bitcoin Core RPC methods (summaries). One call replaces up to 142 individual lookups. Returns name, category, summary, and parameter count for every method.
Basebitcoind.appfrom $0.0011 endpoint - Aapi.gigsoul.comDeveloper tools
Fast, cheap spam-risk gate for one email: pass/warn/fail, a 0-100 score, and up to 3 flagged phrases. Use for a go/no-go before sending or for bulk screening of many drafts. No rewrites. For a full audit with reasons, subject-line risk, and rewritten copy, use analyze-email-deliverability. Content signals only; no inbox-placement guarantee.
Baseapi.gigsoul.comfrom $0.0051 endpoint - Aapi.bakhour.caDeveloper tools
Resolve ONE DNS record type for a domain -- the cheapest, narrowest domain-check endpoint. For all record types at once, use /domain/intelligence. For a bundled DNS+TLS+headers audit, use /web/audit (raw) or /security/posture (scored). For mail-security plus a scored verdict, use /domain/due-diligence.
Baseapi.bakhour.cafrom $0.0051 endpoint - OOrionCMD ChecksDeveloper tools
When does this domain's TLS certificate expire, and is renewal stuck? Input: ?domain=example.com. Returns issuer, not_after, days_left, % lifetime used, renewal cadence, a renewal-stall flag (from Certificate Transparency logs via Cert Spotter) and a live HTTPS handshake/status probe. $0.01 USDC on Base. Certificate details come from CT logs, not the live served cert. For cert+DNS+expiry in one ca
Baseorioncmd-checks-mcp.dario-9fa.workers.devfrom $0.011 endpoint - Nnyc-license-verify.iykykblog.workers.devDeveloper tools
Verify an NYC Department of Consumer and Worker Protection (DCWP) business license by license number or business name. Returns license status, industry category, license type, expiration date, and business address. NYC-only coverage, active licenses only. Public-domain NYC Open Data.
Basenyc-license-verify.iykykblog.workers.devfrom $0.051 endpoint - Fformd-offering-verify.iykykblog.workers.devDeveloper tools
SEC Form D private-placement check by issuer name or CIK: has the issuer filed Form D, and for each filing the exemptions claimed (Rule 506(b)/506(c), Rule 504, Section 3(c) exclusions), total offering amount, amount sold, and date of first sale. Full history from public-domain SEC Form D data sets (2008-present).
Baseformd-offering-verify.iykykblog.workers.devfrom $0.051 endpoint - DDragons Eye LookupDeveloper tools
Has a ransomware group claimed this company or vendor? Input: ?q=acme.com or ?q=Acme Corp (domain or company name). Returns found, claim_count and each claim's group, claimed/first-seen dates, country, sector and source with license. $0.01 USDC on Base. Useful for vendor due diligence. These are unverified claims from criminal leak sites, not proof of a breach. For many domains at once use /v1/bat
Basedragonseye-lookup.dario-9fa.workers.devfrom $0.011 endpoint - Wwage-verify.iykykblog.workers.devDeveloper tools
Market salary bands + offer verdict by SOC occupation and metro area. Returns annual wage percentiles (p10/p25/median/p75/p90), mean, employment, and a below_market/competitive/above_market verdict against your offer. BLS OEWS May 2025 public-domain data.
Basewage-verify.iykykblog.workers.devfrom $0.081 endpoint - Wwebhook-api-production-4378.up.railway.appDeveloper tools
Register a webhook endpoint
Basewebhook-api-production-4378.up.railway.appfrom $0.012 endpoints - LList unitsDeveloper tools
List the supported units and their metadata (abbreviation, measure, system, singular/plural names), optionally filtered to a single measure — a discovery endpoint for choosing valid `from`/`to` values.
Baseunit.openverbs.comfrom $0.0022 endpoints
Service data comes from the Coinbase CDP and PayAI discovery lists and refreshes every few hours. Usage is paid calls over the last 30 days. APIs launched here are verified by us; the rest are paid directly to their owners.