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Comms & Messaging

Email, chat, SMS and notification delivery. Most of these need the operator’s own account or key before anything is sent.

3,474 services with a source 145 pages

Bulk Email Validate x402 REST usage

Validate up to 500 email addresses in one paid request using syntax, MX, disposable, role-account and domain-risk checks.

agent-vending-production.up.railway.app Comms & Messaging 2 calls / 30d checked 2026-11-09
0.003 USDC per call per call

AgentStall ZA x402 REST usage

Email security and spoofing check for any domain: grades DMARC, SPF, DNSSEC, MTA-STS and TLS-RPT from public DNS and says how easily fake email could be sent in the domain's name. Alternatively returns daily-updated scor...

agentstall.nilesh-b54.workers.dev Comms & Messaging 2 calls / 30d checked 2026-11-09
0.003 USDC per call per call

Macro x402 REST usage

US macro indicators (CPI, Fed funds rate, unemployment, GDP) from FRED + FOMC meeting calendar. $0.002 per call. Reference data only — not financial advice.

api.mekongtradeintel.com Comms & Messaging 3 calls / 30d checked 2026-11-09
0.002 USDC per call per call

Biodiversity density x402 REST usage

Assesses the recorded biodiversity of an area around a point: how many distinct species appear, how many records support them, how recent those records are, how many separate datasets contributed, and the breakdown by ki...

natur.halowerk.com Comms & Messaging 1 calls / 30d checked 2026-11-06
0.006 USDC per call per call

Availability resolve x402 REST usage

Give it a search window, a meeting length, and for each participant a list of busy blocks — start and end, nothing else — and it returns the windows in which the meeting fits. Each participant carries their own IANA time...

buero.halowerk.com Comms & Messaging 3 calls / 30d checked 2026-11-08
0.002 USDC per call per call

Sms receive x402 REST usage

Creates a five-minute inbound SMS lease through a configured licensed provider, polls received messages, and releases the number upstream on cancellation, expiry or failed x402 settlement. Twilio is supported directly; a...

ident.halowerk.com Comms & Messaging 1 calls / 30d checked 2026-11-08
0.006 USDC per call per call

Email headers x402 REST usage

GlianaAI - Pay-per-call AI models, live market data, SEC filings and identity APIs, no signup, USDC. This resource: tools/email-headers. Read raw email headers and find sender spoofing. https://ai.glianalabs.com

api.glianalabs.com Comms & Messaging 2 calls / 30d checked 2026-11-09
0.003 USDC per call per call

Validate email x402 REST usage

Validate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing.

email.openverbs.com Comms & Messaging 1 calls / 30d checked 2026-10-31
0.006 USDC per call per call

Verify x402 REST usage

Email verification / email validation / bounce check before sending: verify one email address: syntax, MX records, mail provider (Google Workspace, Microsoft 365, ...), catch-all detection, role/free/disposable flags and...

mailferret.appin60.com Comms & Messaging 2 calls / 30d checked 2026-11-09
0.003 USDC per call per call

Hidden text scan x402 REST usage

Check an email or web page for text a person reading it would not see but an AI reading it would: HTML comments, display:none or hidden elements, white-on-white or off-screen text, zero-width and tag characters, base64 t...

agent402.tools Comms & Messaging 6 calls / 30d checked 2026-11-09
0.001 USDC per call per call

List holidays x402 REST usage

List a country's holidays for a calendar year (optionally by state/region, language and type).

holidays.openverbs.com Comms & Messaging 3 calls / 30d checked 2026-11-09
0.002 USDC per call per call

Email Address Validation x402 REST usage

Check an email address before sending: syntax, whether the domain exists and has mail servers (MX), disposable/temporary provider, role address (info@, sales@), free provider and typo suggestion (gmial.com -> gmail.com),...

bess-x402.onrender.com Comms & Messaging 2 calls / 30d checked 2026-11-09
0.003 USDC per call per call

d21 email_validate x402 REST usage

Email Validate ($0.006): syntax + live MX/A-fallback deliverability + disposable-domain + role-address + free-webmail-provider + SPF/DMARC, with no third-party validation vendor at all -- syntax is RFC 5321/5322 grammar,...

draconic21-x402-api.onrender.com Comms & Messaging 1 calls / 30d checked 2026-11-09
0.006 USDC per call per call

paygentic x402 REST usage

DNS check for a domain: does it resolve, plus A, MX and NS records. Input: d.

api.discoverdmc.cloud Comms & Messaging 6 calls / 30d checked 2026-10-25
0.001 USDC per call per call

Email check x402 REST usage

Domain DNS and email-security check: A/AAAA, NS, MX (incl. null MX), SPF, DMARC policy, CAA, plus a list of issues and a 0-100 email security score. Use before sending email to or trusting a domain.

nightshift-x402.nightshift-labs.workers.dev Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

Webhook inbox x402 REST checked

Gives an agent without a reachable server a place to receive callbacks. create returns a public URL that accepts any POST, GET or PUT from a third party; poll returns the events that arrived since a cursor you carry forw...

agent.halowerk.com Comms & Messaging 1 calls / 30d checked 2026-11-08
0.005 USDC per call per call checked

verify.camelai.io x402 REST usage

Verify if an email address is valid and likely deliverable. Send {"email": "user@example.com"}

verify.camelai.io Comms & Messaging 1 calls / 30d checked 2026-10-25
0.005 USDC per call per call

Verify x402 REST usage

Check whether an email address is well-formed and its domain can receive mail, before you send. Five DNS checks on an email address, no message sent: syntax, MX presence and hosts, SPF record, DMARC policy, disposable do...

api.x-402.online Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

Inbox x402 REST usage

Read the messages received by a phone number rented through /v1/sms/number: sender, body, and reception time, returned as structured data so an agent can extract a verification code without human help. The number is a ph...

api.x-402.online Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

Contacts x402 REST usage

Collect the emails, phone numbers and social profiles a page visibly publishes. Emails, phone numbers and social profile links visibly published on a page, read from the rendered DOM and mailto: and tel: links. Nothing i...

api.x-402.online Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

Email guard x402 REST usage

Read one email the way an agent that triages mail should before acting on it: observations with evidence and offsets, no score and no verdict. Send the raw RFC 5322 message (multipart, base64 and quoted-printable decoded...

agent402.tools Comms & Messaging 5 calls / 30d checked 2026-11-09
0.001 USDC per call per call

Check email x402 REST usage

ShieldAPI - x402 security preflight before agents trust an identity, sender, or email counterparty

shield.vainplex.dev Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

Validate email x402 REST usage

Email validation — Syntax check + live MX/deliverability + disposable-domain flag.

mcpfax-utility.bowling-anthony.workers.dev Comms & Messaging 1 calls / 30d checked 2026-11-09
0.005 USDC per call per call

enrich-email x402 REST usage

Validate and classify an email DOMAIN from public DNS: MX hosts + mail-provider, SPF and DMARC policy, plus disposable / free-webmail / role-account flags and a deliverability signal. No SMTP probing of individual mailbo...

api.agentstools.dev Comms & Messaging 1 calls / 30d checked 2026-11-06
0.005 USDC per call per call

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