sms77.io API (seven.io)

sms77.io

Provides REST/HTTP APIs to send SMS, RCS, and Voice messages, validate numbers, and manage contacts and groups.

The sms77.io API (seven.io) API uses api key authentication; has usage based pricing; offers a free tier (Free test credit on registration). Verified 2026-07-12 with per-field source links.

Communication Verified 2026-07-12 low confidence

Base URL

not documented null

no source

Auth

api_key

docs.seven.io ↗

Free tier

Free test credit on registration

seven.io ↗

Pricing model

usage_based

seven.io ↗

Pricing

Pay only for what you actually consume; specific prices not documented on crawled pages

seven.io ↗

Rate limits

not documented null

no source

OpenAPI spec

not documented null

no source

MCP server

MCP Server listed in documentation navigation

docs.seven.io ↗