← All headings
Email & messaging
3,285 listings from 1,984 providers, 2,416 answering · counted
Filed by addrbook from the words in each listing, so a heading says what a listing claims to be for.
Showing 1–25, one row per provider, those answering first · names and descriptions as their source publishes them
- Messages autoagent402.toolsAnthropic Messages API over x402 - point the Anthropic SDK (or Claude Code / the Agent SDK) at base_url https://agent402.tools/v1/auto and pay $0.01 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Messages wire (Claude natively, others translated). Depth: `effort` (low..max) on Claude 4.7+ and Haiku 5.5, thinking.budget_tokens on older Claude.Livechecked Evidence 2/4x402x402 Bazaar1 payer22 more from agent402.tools
- api.onesource.io/standard/v1/policy/outlookapi.onesource.ioThe Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. A current-pace projection of the Central Bank's policy multiplier and issuance rate if the current epoch's net flow direction holds until close. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.Livechecked Evidence 2/4x402x402 Bazaar85 payers
- StableEnrichstableenrich.devPDL Person Enrich — career history, emails, phone. Requires one of: `email`, `profile` (LinkedIn URL), or `first_name` + `last_name` + (`company_name` OR `company_domain`). `{ first_name, last_name }` alone returns 400. Prefer `email` when known, then `profile`. No match: HTTP 200, status 404, data null — not billed. Match: $0.28.Livechecked Evidence 2/4x402x402 Bazaar40 payers1 more from stableenrich.dev
- cloud.trycorpus.ai/v1/capacity/stresscloud.trycorpus.aicorpusAI Cloud Pricing: Capacity stress score, 0 (slack) to 100 (tight), for one GPU model on one day, with every component.Livechecked Evidence 2/4x402x402 Bazaar23 payers
- Bulk email verificationapexfaucet.xyzBulk email verification: up to 100 addresses in one call. Clean an email list: pass ?emails=a@b.com,c@d.com (up to 100 in one call) and get a verdict per address plus totals. Each address is checked for usable shape, for MX records read live over DNS, against 25 known disposable-mail domains and against 27 role-account names like info, support and admin. Verdicts are deliverable-domain, role-account, disposable, undeliverable, unknown or invalid, and each one says in words what it means.Livechecked Evidence 2/4x402x402 Bazaar1 payer2 more from apexfaucet.xyz
- win.oneshotagent.com/v1/tools/lookup/person-email-statuswin.oneshotagent.comEmail deliverability verificationLivechecked Evidence 2/4x402x402 Bazaar15 payers5 more from oneshotagent.com
- Nero Labs Agent Toolsx402-agent-tools.nerolabs.workers.devChecks one email address and returns valid, risky or invalid with the reasons: address format, whether the domain can receive mail (live MX lookup), known throwaway domains (mailinator and others, invalid), shared inboxes like info@ or sales@ (risky), likely typos such as gmial.com with the fix in didYouMean, and free providers such as gmail.com (flag only). Does not ping the mailbox (no SMTP), so valid is not a delivery guarantee.Livechecked Evidence 2/4x402x402 Bazaar12 payers3 more from nerolabs.workers.dev
- api.loyalspark.online/x402-gateway/mcp-tools/mint_loyalty_tokensapi.loyalspark.onlineLoyalty rewards: Fee-first mint calls[] (protocol fee first, then recipient) + fee_obligation_id. Accepts 0x Base wallet or customer email in recipient_address (or recipient_email). Confirm with confirm_mint_fee. Onchain loyalty on Base: brands launch rewards in minutes, customers earn with every purchase, AI agents automate the rest via REST and MCP. Sen...Livechecked Evidence 2/4x402x402 Bazaar12 payers1 more from loyalspark.online
- AgentWirecdp-agent-0-01.onrender.comAgentWire service card for webhook inbox relay and web fetch infrastructure.Livechecked Evidence 2/4x402x402 Bazaar12 payers
- x402.orthogonal.com/apollo/api/v1/people/matchx402.orthogonal.comEnrich a person by email, LinkedIn URL, name+company, or other identifiers. Returns contact details, job info, and social profiles.Livechecked Evidence 2/4x402x402 Bazaar11 payers34 more from orthogonal.com
- NetIntelnetintel.devEmail deliverability & domain security check — validates SPF, DKIM (multi-selector), and DMARC, detects spoofing and misconfigurations, and returns an A–F email security grade with transparent deductions. Anti-spam / anti-phishing readiness for any sending domain.Livechecked Evidence 2/4x402x402 Bazaar11 payers10 more from netintel.dev
- Gennius Rewardsx402.gennius.oneBuys gennius-reward reward units with USDC, issued to the email in the request. One unit costs 0.00675 USDC; the amount spent buys amount / 0.00675 units and must be a multiple of the unit price, from 0.00675 to 9999.99675 USDC depending on the network. Returns a receipt with the units bought, the network, the settlement transaction hash and the product id.Livechecked Evidence 2/4x402x402 Bazaar11 payers
- Sift Web Toolssift.srv1996466.hstgr.cloudEmail address check: syntax, MX, disposable, role and free-provider flags. Validate an email address without sending mail: syntax, MX records, disposable-domain list, role account and free-provider flags, plus a verdict.Livechecked Evidence 2/4x402x402 Bazaar11 payers1 more from srv1996466.hstgr.cloud
- Old Colony Web Agent Servicesapi.oldcolonyweb.comFor $0.002, privacy-conscious email preflight: submitted addresses and request bodies are not intentionally logged in routine application telemetry (full address still reaches our server). Inspect syntax, DNS/MX, listed disposable domains and provider typos; receive structured decisions. API reverse-proxy access logging is disabled; infrastructure/payment providers may keep records. No zero-retention, mailbox-existence, deliverability or consent guarantee.Livechecked Evidence 2/4x402x402 Bazaar10 payers2 more from oldcolonyweb.com
- ScrapeCheckscrapecheck.fly.devXML tier (deterministic, no LLM): verifies a claimed value lives at a named path in a public XML document, by independent double re-fetch. Use it for feeds and sitemaps; for JSON use /verify-json, for HTML use /verify. Paths address elements and @attributes (urlset.url[0].loc). String-exact; ambiguous or volatile values return unverifiable, never a guess. First 100 checks per client are free: resend with header X-Use-Free-Allowance: yes and no payment to use them.Livechecked Evidence 2/4x402x402 Bazaar10 payers5 more from scrapecheck.fly.dev
- AveDaris Agent Utilitiesapi.avedaris.comNormalize an email address for matching: send an address and get its local part, domain and a lowercase comparison form. Syntax only; it does not verify the mailbox. Pair with email-auth-check for the domain. $0.001 USDC per call on Base.Livechecked Evidence 1/4x402x402 Bazaar9 payers3 more from avedaris.com
- Geo402geo402.comGeo web fetch for AI agents. Fetch any public web page from a residential IP in a chosen country (190+ countries, optional city or US state) as clean markdown, text or HTML, with the product price/currency/availability extracted automatically when the page has product data. $0.005 per page, only charged when the page loads. Respects robots.txt; no CAPTCHA solving; sign-in, payment and email services are blocked. Up to 2 MB per page. Check a URL free first: /api/fetch/checkLivechecked Evidence 1/4x402x402 Bazaar9 payers
- Forest Webhttp--forest-gas-station-mainnet--lcjl27p8lmjs.code.runVerify email syntax and public DNS readiness with a bounded deterministic preflight. Forest checks normalized syntax, MX/address records including explicit null MX, and curated role/free/disposable-domain signals, then returns a conservative safe-to-attempt decision. It never connects to SMTP, sends mail, authenticates, stores customer mailboxes or claims that a mailbox exists. Base mainnet USDCLivechecked Evidence 1/4x402x402 Bazaar8 payers
- PaywallWatchapi.paywallwatch.comUse when an agent needs email validation, screening only, for an address from a form, a scrape or a CRM and must decide whether it is worth sending to. Screens the address: syntax, DNS mail exchanger, disposable domain, role account, free provider and common typos. It does not verify that the mailbox exists. A DNS failure answers 503 and is not charged.Livechecked Evidence 1/4x402x402 Bazaar8 payers
- italycheck.italycheck.workers.dev/v1/paitalycheck.italycheck.workers.devLook up an Italian public administration or public-service operator by 11-digit codice fiscale in IndicePA (AgID). Use when an agent must verify a public-sector counterparty, find its official PEC (certified email) addresses, or confirm it exists before e-invoicing. Input: ?cf=80016350821.Livechecked Evidence 1/4x402x402 Bazaar8 payers
- TariffMonkeetariffmonkee.comEmail deliverability verdict: checks syntax, MX record presence, disposable-domain match and SPF/DMARC presence. Returns deliverable, risky or undeliverable with reasons. Scoped to one address, not a domain security audit.Livechecked Evidence 1/4x402x402 Bazaar8 payers1 more from tariffmonkee.com
- AgentStall ZAagentstall.nilesh-b54.workers.devSouth African phone number formatting and classification: converts an SA number in any common format to international +27 (E.164) and local formats, and says whether it is mobile, landline (with area for major cities), toll-free, VoIP or premium-rate. Useful for cleaning contact lists, SMS and WhatsApp messaging, and form validation.Livechecked Evidence 1/4x402x402 Bazaar8 payers1 more from nilesh-b54.workers.dev
- Agent Utility Suitex402-agent-api.onrender.comIs this email address real and safe to send to? Checks syntax, MX records (and null MX), disposable providers, free webmail, role accounts (info@, support@), likely typos of big providers with a suggestion (gmial.com to gmail.com), SPF and DMARC. Returns deliverable / risky / undeliverable, a 0-100 score and reasons. No mail is sent. $0.001 USDC per call.Livechecked Evidence 1/4x402x402 Bazaar7 payers1 more from x402-agent-api.onrender.com
- Quant Agent Shopquantagentshop.comEmail address check without sending mail. Returns syntax validity, the normalised address, whether the domain accepts mail (MX, null MX or address fallback), and flags for disposable, role (info@, support@) and free webmail addresses, with a verdict. Use to validate an address someone gave you. Does not confirm the mailbox exists. Typical response under 1 s. Failed calls are not charged.Livechecked Evidence 1/4x402x402 Bazaar7 payers1 more from quantagentshop.com
- DomainCheck by AgentGateapi.youraitools.coDomain trust report for AI agents: is this domain real, how old is it, who registered it, and is its email locked down? DNS (A/AAAA/NS/MX/CAA), DNSSEC, SPF, DMARC, DKIM (common selectors), MTA-STS, TLS-RPT, BIMI, RDAP registration date + registrar + status, parking and disposable detection, risk flags, 0-100 score and verdict. Public DNS + RDAP, no data stored.Livechecked Evidence 1/4x402x402 Bazaar7 payers7 more from youraitools.co