{"uid":"cap_M7DSuZdz-thdtRAFUCl_M","slug":"klymax402-email-send-api-2b2d5b52","name":"klymax402 Email Send API","description":"One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.","url":"https://klymax402.com/api/email-send/api/send","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"to":{"type":"string","description":"Recipient email address"},"body":{"type":"string","description":"Email body content (plain text)"},"from":{"type":"string","description":"Sender email address (default: noreply@x402.dev)"},"html":{"type":"string","description":"Email body content (HTML, optional — overrides body)"},"subject":{"type":"string","description":"Email subject line"}}},"responseSchema":{"type":"json","example":{"to":"example","from":"example","mode":"example","status":"example","subject":"example","messageId":"example","timestamp":"example","bodyLength":1,"contentType":"example"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0xFQIML9nRxkoXcrTsqWT","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Sends a transactional email to a specified recipient with a custom subject and body (plain text or HTML) via a pay-per-call x402 endpoint.","exampleAgentPrompt":"Send an email to sarah@example.com with the subject 'Your weekly report is ready' and a plain-text body saying 'Hi Sarah, your report for this week has been generated and is attached. Let us know if you have questions.'","exampleUseCases":[{"title":"Agent alert notification","prompt":"Email alerts@myteam.com with subject 'Critical alert: service down' and body 'Our payment processor has been unreachable for 10 minutes — please investigate immediately.'"},{"title":"User onboarding welcome email","prompt":"Send a welcome email to newuser@gmail.com with subject 'Welcome to our platform!' and an HTML body that says '<h1>Welcome!</h1><p>We're thrilled to have you. Click below to get started.</p>'"},{"title":"Automated report delivery","prompt":"Email the weekly sales summary to boss@company.com — subject line 'Weekly Sales Summary', body 'Total sales this week: $42,300. Top product: Widget Pro. See dashboard for details.'"}],"resultDescription":"Returns a JSON object confirming delivery with fields including: messageId (unique ID for the sent message), status (delivery status), to (recipient), from (sender), subject, timestamp, bodyLength (character count of the body), contentType (text/plain or text/html), and mode.","failureModes":["Invalid recipient email address format — delivery fails or bounces","Missing required fields (to, subject, body/html) — API returns error","Sender address override rejected if domain not authorized","Payment failure if insufficient USDC balance — 402 response returned","Rate limiting or spam filtering by downstream email provider"],"whenToPreferThis":"Choose this endpoint when an AI agent needs to send a transactional or notification email on a pay-per-call basis without requiring pre-configured API keys or an email service account. It is especially useful in agentic workflows where email delivery is an occasional side-effect action (e.g. alerting a user, delivering a report) and where the x402 micropayment model fits the billing context. Prefer alternatives like SendGrid or Mailgun if you need bulk sending, templates, or analytics dashboards.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:54:30.528Z","isFirstParty":false}