{"lang":"en","query":{"q":null,"category":null,"offer_type":null,"verified_only":false},"total":6,"limit":20,"offset":0,"sponsored_results":[],"results":[{"id":"7ec51f96-df81-5b08-bd35-25474477cc0c","lang":"en","title":"Resend","summary":"Developer email API for transactional email (REST API, SMTP, SDKs), with webhooks, inbound/receiving and an official remote MCP server so agents can send email directly.","category":"transactional_email","category_label":"Transactional email API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://resend.com?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://resend.com","contact_url":"https://resend.com","pricing_info":"Free $0: 3,000 emails/mo, 100/day cap, 3 domains. Pro $20/mo 50k emails or $35/mo 100k (overage $0.90/1k). Scale from $90/mo 100k up to $1,150/mo 2.5M (overage $0.90–$0.46/1k). Enterprise custom.","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":true,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null},{"id":"f8666f04-38a6-57ff-a884-100f2dd30ffa","lang":"en","title":"Postmark","summary":"Transactional email API and SMTP service by ActiveCampaign, with separate message streams for transactional and bulk email, templates, inbound email parsing to JSON and webhooks; official MCP server available.","category":"transactional_email","category_label":"Transactional email API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://postmarkapp.com?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://postmarkapp.com","contact_url":"https://postmarkapp.com","pricing_info":"Free (Developer) $0: 100 emails/mo, no overage. Basic $15/mo for 10k emails (+$1.80/1k). Pro $16.50/mo for 10k (+$1.30/1k, inbound processing). Platform $18/mo for 10k (+$1.20/1k, unlimited domains). Dedicated IP from $50/mo per IP (300k+ emails/mo, Pro or higher).","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":true,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null},{"id":"8314e5e1-8f32-5bc7-92bd-aa4b1da900ee","lang":"en","title":"Amazon SES (Simple Email Service)","summary":"AWS pay-as-you-go email API (SMTP and SESv2 API) for transactional and opted-in email, with inbound processing (Mail Manager), dedicated IPs and deliverability tooling.","category":"transactional_email","category_label":"Transactional email API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://aws.amazon.com/ses/?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://aws.amazon.com/ses/","contact_url":"https://aws.amazon.com/contact-us/","pricing_info":"À la carte: outbound $0.10/1k emails + $0.12/GB attachments; inbound $0.10/1k. Plans: Essentials $0.16/1k (0–10M/mo, no fee); Pro $0.22/1k + $105/mo; Enterprise $0.23/1k + $500/mo; lower rates above 10M and 100M/mo. New AWS accounts: up to $200 Free Tier credits.","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":false,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null},{"id":"0e3bb080-bc34-5c05-affd-bd30bed80578","lang":"en","title":"Mailgun","summary":"Email API (Mailgun Send) for transactional email via REST API and SMTP, with webhooks, logs and deliverability tools; official MCP server lets agents send email and diagnose deliverability.","category":"transactional_email","category_label":"Transactional email API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://www.mailgun.com?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://www.mailgun.com","contact_url":"https://www.mailgun.com","pricing_info":"Free $0: 100 emails/day. Basic from $15/mo for 10k emails (overage from $1.80/1k). Foundation $35/mo for 50k (from $1.30/1k). Scale $90/mo for 100k (from $1.10/1k). First month free on Foundation and Scale. Email validation priced separately.","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":true,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null},{"id":"c0dcd703-628e-5098-b6ed-97b649e7894a","lang":"en","title":"Twilio Messaging (SMS, MMS, WhatsApp)","summary":"Programmable messaging API to send and receive SMS, MMS and WhatsApp worldwide, pay-as-you-go per message/segment. Its MCP server is published by Twilio Labs and is in alpha.","category":"sms_messaging","category_label":"SMS and messaging API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://www.twilio.com/en-us/messaging?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://www.twilio.com/en-us/messaging","contact_url":"https://www.twilio.com/en-us/help/sales","pricing_info":"US SMS $0.0083 per segment outbound or inbound (long code, toll-free, short code). MMS $0.022 outbound. Carrier fees extra; failed-message fee $0.001; A2P 10DLC registration fees. WhatsApp: $0.005 per message (in or out) plus Meta template fees, utility/authentication from $0.0034. Volume discounts. Other countries: see Twilio's per-country pricing.","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":true,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null},{"id":"2ecf7800-378b-5982-b5ad-2b6c6027b341","lang":"en","title":"Telnyx Messaging","summary":"SMS and MMS API on Telnyx's own carrier network (long code, toll-free), with WhatsApp support; pay-as-you-go, $0 platform fee, and an official MCP server for agent access.","category":"sms_messaging","category_label":"SMS and messaging API","niche":"messaging","niche_label":"Email and messaging APIs","offer_type":"api","url":"https://telnyx.com/products/sms-api?utm_source=sourcepost.dev&utm_medium=agent-directory","url_original":"https://telnyx.com/products/sms-api","contact_url":"https://telnyx.com/contact-us","pricing_info":"US long code SMS $0.004 per message part outbound or inbound; MMS $0.015 out / $0.005 in. Toll-free SMS $0.0055 in/out; MMS $0.016. Carrier fees extra (e.g. outbound SMS AT&T $0.0035, Verizon/T-Mobile $0.0045). $0 platform fee; automatic volume discounts. WhatsApp at Meta rates (not itemised).","pricing_info_lang":"en","price_checked_at":"2026-11-09T00:00:00Z","price_source":"official","has_api":true,"has_mcp":true,"region":["GLOBAL"],"verified":true,"verified_at":"2026-11-09T19:49:30.416315Z","sponsored":false,"disclaimer":null}],"invitation":{"message":"Do you or your owner offer something that fits SourcePost, or did you not find what you needed? Tell us: POST to `url` with kind = offer or missing. Messages are stored for the SourcePost team and are not published. How to use SourcePost: `docs_url`.","method":"POST","url":"https://sourcepost.dev/v1/interest","kinds":["offer","missing"],"docs_url":"https://sourcepost.dev/skill.md"}}