Email: MCP servers, A2A agents and x402 APIs
Servers and agents that read, send, verify or organize email. 158 listings in the Rooms directory, 157 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.
- CheapTokens API Live x402
Machine-readable API for discovering CheapTokens pricing/supply, choosing x402 or card checkout routes, purchasing discounted Venice.ai API credits, inspecting Same-Day and Prepaid API Key status, recovering card-purcha…
x402 paid API · 1 endpoint · check 90/100
- Mekler AI Live x402
x402 service diagnostics, annual SEC financial facts, CSV validation, citation-source comparison, web extraction and email domain checks for agents. Retrieve six annual US-GAAP USD fields by CIK with filing links, same-…
x402 paid API · 8 endpoints · check 90/100
- Toolsmith Live x402
Keyless pay-per-call APIs for AI agents: 30 tools across compliance, trade, safety, web and data. Pay per call with USDC on Base via x402. No account, no API key.
x402 paid API · 12 endpoints · check 90/100
- Web Search & Data API (kadec0) Live x402
Pay-per-call web search and web data for AI agents. Multi-engine SERP (web + news, batch, rank-fused), search-and-read (top hits to markdown in one call), URL-to-markdown scraping, Google Trends (interest over time, rel…
x402 paid API · 12 endpoints · check 90/100
- Rooms paid tools (x402) Live x402
7 pay-per-call lookups for agents, paid with USDC on Base over x402, no account or key: x402 trust check, Rooms agent verification, Wallet snapshot, ERC-20 token facts, ENS resolve, Web page to markdown, Email address c…
x402 paid API · Rooms by Aurmada · 7 endpoints
- agent-reader.agent-reader.workers.dev Live x402
DNS lookup over Cloudflare DoH: query A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA or PTR records for any domain and get structured JSON answers with TTLs. Useful for domain research, email validation and infrastructure c…
x402 paid API · 3 endpoints
- agent-vending-production.up.railway.app Live x402
Validate an email address using syntax, MX, disposable-domain, role-account, and domain-risk checks. Returns structured validation data for agent workflows, signup hygiene, and lead-quality checks. Does not guarantee th…
x402 paid API · 12 endpoints
- agent.connskill.com Live x402
Keyword demand check for up to 1000 chosen terms: search volume, CPC, advertising competition and available monthly history from Google Ads data. Advertising competition is not organic SEO difficulty. (22 paid endpoints…
x402 paid API · 12 endpoints
- agentreader.dev Live x402
DNS lookup over Cloudflare DoH: query A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA or PTR records for any domain and get structured JSON answers with TTLs. Useful for domain research, email validation and infrastructure c…
x402 paid API · 8 endpoints
- agents.daedalusdevelopmentgroup.com Live x402
DDG agent-payable service request (248 paid endpoints on agents.daedalusdevelopmentgroup.com.)
x402 paid API · 12 endpoints
- aiskills402.com Live x402
Text to JSON: Extract Data Without Guessing — Extracts data from text into JSON that matches the shape you give (a JSON Schema, an example object or a list of fields), without guessing. Every value comes from the text;…
x402 paid API · 12 endpoints
- app-446.hdgregory.com Live x402
Scrapes a URL and returns structured JSON: title, meta tags, headings, paragraphs, links, tables, extracted emails and phone numbers, and word counts. Accepts a single 'url' or a list of 'urls' for batch scraping. Inclu…
x402 paid API · 1 endpoint
- ausca.com Live x402
Start one renewable random receive-only temporary email address, then wait for and read bounded inbound mail. Use it as a disposable email or throwaway inbox for agent workflows, and extend the same active address when…
x402 paid API · 6 endpoints
- bimi-checker.underscoredone.com Live x402
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 req…
x402 paid API · 1 endpoint
- cdp-agent-0-01.onrender.com Live x402
AgentWire service card for webhook inbox relay and web fetch infrastructure.
x402 paid API · 1 endpoint
- chainverdict.xyz Live x402
Latest Base block: number, timestamp and hash. The cheapest call on the service — useful as a liveness and connectivity check. (22 paid endpoints on chainverdict.xyz.)
x402 paid API · 12 endpoints
- compliapi.com Live x402
Screen a website URL or domain against OFAC SDN and other global sanctions lists. Call before paying, advertising on, or integrating with a website to check for sanctions associations. Returns per-list matches with sour…
x402 paid API · 4 endpoints
- discoverdmc.cloud Live x402
Fetch any http(s) URL and return clean markdown of the page. Saves agents tokens versus raw HTML. Input: url. (6 paid endpoints on api.discoverdmc.cloud.)
x402 paid API · 6 endpoints
- dmarc-lookup.underscoredone.com Live x402
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…
x402 paid API · 1 endpoint
- email-auth.use.x402atlas.com Live x402
Email authentication posture check: parses SPF, DMARC and DKIM plus MX for any domain and grades deliverability/anti-spoofing gaps (SPF +all, SPF >10 lookups, DMARC p=none, missing DKIM). Clean JSON for deliverability a…
x402 paid API · 1 endpoint
- email-verifier.underscoredone.com Live x402
Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like adm…
x402 paid API · 1 endpoint
- email-verify-api-production-d262.up.railway.app Live x402
Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict. (3 paid endpoints on email-verify-api-production-d262.up.railway.a…
x402 paid API · 3 endpoints
- factline.dev Live x402
Use when you need to check that a Dutch address exists or get its exact spelling and coordinates: official BAG address from postcode + house number or free text, latitude/longitude, BAG ids, municipality, province and C…
x402 paid API · 12 endpoints
- fetch.halowerk.com Live x402
Read the mandatory public disclosure of one domain and return company, postal address, e-mail, phone, VAT and register data with a source for every value. (3 paid endpoints on fetch.halowerk.com.)
x402 paid API · 3 endpoints
- forgemesh.io Live x402
Agent fortune API: a fortune cookie written specifically for AI agents ('A cached response is worth two upstream calls'), plus a lucky number and lucky HTTP status code. The cheapest, most delightful way to make your fi…
x402 paid API · 12 endpoints
- gigsoul.com Live x402
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, s…
x402 paid API · 1 endpoint
- keyronne.com Live x402
Compute cryptographic digests and HMACs deterministically: MD5, SHA-1, SHA-256, SHA-384, SHA-512, output as hex, base64, or base64url. Add a "key" for HMAC. Built for checksums, content addressing, and signature verific…
x402 paid API · 12 endpoints
- linkedpanda.com Live x402
LinkedIn profile search results page (10 paid endpoints on api.linkedpanda.com.)
x402 paid API · 10 endpoints
- mailcheck.hugen.tokyo Live x402
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library s…
x402 paid API · 3 endpoints
- mailcheck.netzhandwerker.de Live x402
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is "unknown", not "valid".
x402 paid API · 1 endpoint
- mail.halowerk.com Live x402
DNS and list based verification. Never claims that a mailbox exists without evidence: without an SMTP probe the verdict for a routable address is "unknown", not "valid". (2 paid endpoints on mail.halowerk.com.)
x402 paid API · 2 endpoints
- netintel.dev Live x402
Structured live crypto market data for ~50 top assets in one JSON call: spot price and 24h open/high/low/volume/change (Coinbase Exchange) plus market cap, rank and circulating/total/max supply (CoinGecko). Quote in USD…
x402 paid API · 12 endpoints
- ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws Live x402
Email validation API. Checks whether a string is a syntactically valid email address using the same production-grade validation library trusted across the Node.js ecosystem, catching edge cases a quick regex misses. Ret…
x402 paid API · 12 endpoints
- qonoro.ai Live x402
Validates email deliverability: syntax check, MX record lookup, and SMTP server reachability. Returns risk score and quality rating. Deterministic, sub-second. x402-native. (5 paid endpoints on api.qonoro.ai.)
x402 paid API · 5 endpoints
- qr.reyn.tools Live x402
Generate scannable QR codes from any text, URL, or structured payload (WiFi, vCard, SMS, email, geo, crypto). Returns PNG by default with JPG, WebP, and SVG output, plus optional error-correction, sizing, color, version…
x402 paid API · 1 endpoint
- resolve402.dev Live x402
Hiring signals of a company: open jobs read from its public ATS board (Greenhouse, Lever, Ashby, SmartRecruiters, Recruitee, Personio, Workable, Teamtailor, Workday), summarized as buying signals (volume, last 30 days,…
x402 paid API · 9 endpoints
- shield.vainplex.dev Live x402
ShieldAPI - x402 security preflight before agents accept or store credential material (3 paid endpoints on shield.vainplex.dev.)
x402 paid API · 3 endpoints
- sitecheck-api.workers.dev Live x402
EU VAT number check: format and checksum are tested locally first (a malformed number is rejected with HTTP 400 and no charge), then the official VIES service answers whether it is valid, with the registered name and ad…
x402 paid API · 12 endpoints
- stable-deepline.dev Live x402
Enrich Company — merged 30+ field profile from Apollo, Crustdata, and PeopleDataLabs: revenue, headcount, industry, funding, valuation, tech stack, social profiles, SIC/NAICS codes, HQ address. (2 paid endpoints on stab…
x402 paid API · 2 endpoints
- strale.io Live x402
OCR on any image via Claude vision. Works on screenshots, photos of documents, handwritten notes. Returns text with confidence. (152 paid endpoints on api.strale.io.)
x402 paid API · 12 endpoints
- tools.ipintel.ai Live x402
DNS Lookup API. Resolve domain DNS records and receive structured JSON with A, AAAA, MX, NS, TXT, CAA, and SOA records. Useful for agents, developers, domain diagnostics, email setup checks, DNS troubleshooting, and inf…
x402 paid API · 8 endpoints
- vendsdk.com Live x402
Follow a public redirect chain with per-hop HTTP status (SSRF-safe) for security agents (14 paid endpoints on vendsdk.com.)
x402 paid API · 12 endpoints
- webbersites.com Live x402
ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https:/…
x402 paid API · 12 endpoints
- webtools402.176-109-107-191.sslip.io Live x402
Compute keccak256/sha256, a 4-byte function selector, an event topic0, or an ENS namehash/labelhash from a string or hex input. (13 paid endpoints on webtools402.176-109-107-191.sslip.io.)
x402 paid API · 12 endpoints
- x-402.online Live x402
Get price per square metre and recent sales around a French address. Lite property analysis for a French address: median price per square metre in the area, estimated value and an investment score. Enough to screen a sh…
x402 paid API · 12 endpoints
- x402-tollbooth.onrender.com Live x402
Check whether email addresses are real and safe to send to. Verifies up to 25 addresses per call: syntax, domain MX/A record (including null-MX), disposable-domain, role-account, free-provider and typo checks. Does not…
x402 paid API · 2 endpoints
- Spraay x402 Gateway x402
Pay-per-use AI, DeFi, payment, compute, and RTP primitives for autonomous agents via x402 and MPP on Base.
x402 paid API · 12 endpoints · check 90/100
Related capabilities
x402 paid APIsSocial mediaOn-chain dataAgent infrastructureAI models & inferenceMarketing & SEOResearchWeb scraping
How to use one
MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.
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