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SimpleTexting API and MCP server

SimpleTexting's API is approval only and its documentation lists no Inbox, no assignments and no send time for campaigns. Sign in to SimpleTexting once in your own Cloud Browser, and your AI agent does the work there for you. The same tools work over MCP for agents and as a REST API for scripts.

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Not affiliated with SimpleTexting.

SimpleTexting's own API leaves this out. So we run one for you.

SimpleTexting's own API, a GitHub MCP server and Cotlet compared
What you need SimpleTexting's APIGitHub MCP serverCotlet
Inbox replies, assignments, scheduled sends No Partly Yes, 12 tools
Acts as you, signed in 24/7 No No Yes, Cloud Browser
Fixed for you when SimpleTexting changes N/A No Yes, tested every 6h
Runs with your laptop off N/A No Yes, hosted

Checked Oct 23, 2026. Sources: SimpleTexting: SMS API and how to get a token · SimpleTexting: API documentation · SimpleTexting on Zapier MCP · SimpleTexting: Scheduled texts

Your own Cloud Browser, on 24/7. Sign in once. We keep it connected.

  1. 01Sign in to SimpleTexting in your own Cloud Browser

  2. 02Connect it for your agents

  3. 03Cotlet keeps it signed in and working

How do I connect SimpleTexting to Claude, ChatGPT or my code?

AI agents connect over MCP, scripts call the REST API. Both reach the same 12 tools with one API key.

For AI agents: MCP

Add Cotlet to your agent once. SimpleTexting and every other app you connect show up as its tools.

  • Claude
  • ChatGPT
  • OpenClaw
  • Hermes
  • GrokBot
  • Cursor
  • n8n
  • Any MCP client
  1. 1

    Add Cotlet to your agent

    Claude Code
    claude mcp add --transport http cotlet \
  https://cotlet.dev/mcp/v1 \
  --header "Authorization: Bearer $COTLET_API_KEY"
    Cursor
    {
  "mcpServers": {
    "cotlet": {
      "url": "https://cotlet.dev/mcp/v1",
      "headers": {
        "Authorization": "Bearer ${COTLET_API_KEY}"
      }
    }
  }
}
    Codex
    # ~/.codex/config.toml
[mcp_servers.cotlet]
url = "https://cotlet.dev/mcp/v1"
bearer_token_env_var = "COTLET_API_KEY"

    Paste the snippet for your client. The same server and key serve every app you connect, so you do this once.

For scripts: REST API

Every tool is an endpoint under /api/v1/simpletexting with its own method and path, such as POST /api/v1/simpletexting/campaign/schedule, with the same API key. Our open-source repo has ready scripts to start from.

REST API docs

What can the SimpleTexting API and MCP server do?

12 tools on your own SimpleTexting account. Agents call them as operations of the MCP tools simpletexting_read and simpletexting_write; scripts call each one at its own REST endpoint, with the same inputs and answers.

API reference
SimpleTexting tools in Cotlet's MCP server and REST API
Tool What it does Access
list_conversations Conversations in the Inbox with the last message of each. read
get_conversation All messages and private notes of one Inbox conversation. read
list_contacts Contacts of the account, filtered by list, segment or search. read
list_lists The contact lists of the account with their size. read
list_segments Saved segments under Contacts, within one list or across all contacts. read
list_campaigns Campaigns of the account, sent and scheduled, with recipients and send time. read
list_keywords Keywords of the account with the list each one adds people to. read
send_message Send a text to one contact, as a reply in the Inbox or as a new conversation. writeasks first
schedule_message Schedule a text to one contact for a date and time. writeasks first
schedule_campaign Create a text campaign for a list or segment and schedule it. writeasks first
add_contact_to_list Add a contact to a list, creating the contact if the number is new. writeasks first
assign_conversation Assign an Inbox conversation to a team member. write

Scroll the table for all 12 tools.

Ask in plain words. Your agent does the rest.

All SimpleTexting use cases

Is it safe to connect SimpleTexting?

You sign in yourself in your own Cloud Browser, we never save your password, and anything that reaches your readers waits for your OK. The browser profile is encrypted in the EU. Independent scanners grade cotlet.dev A+.

Security overview

How much do the SimpleTexting API and MCP server cost?

One price for both: a tool call costs the same over MCP or REST. Free 7-day trial with 2,000 credits, no card needed. Then one-time credit packs, no subscription, valid 12 months. Each call uses 10 credits, and your Cloud Browser uses 50 credits a day while SimpleTexting is enabled for agents, so 20 calls a day come to 250 credits.

See full pricing
Cotlet credit packs: price, credits and calls at 10 credits each
Credits Price, one time Calls at 10 credits Per 1,000 credits
5,000 $29 500 $5.80
15,000 $79 1,500 $5.27
32,000 $149 3,200 $4.66
60,000 $249 6,000 $4.15

Only successful calls use credits; failed calls and timeouts cost nothing. At a balance of 0 calls pause, never a surprise charge. Authenticate with the Authorization: Bearer header.

Questions

Does SimpleTexting have an API?

Yes, SimpleTexting has a REST API on any paid plan, but only on approval, and it has no official MCP server (checked 23 Oct 2026). You send support your use case and a written acknowledgment of the terms, and a token follows.

How do I get access?

Sign up free, open SimpleTexting under Integrations in the console and press Request access. Your free trial starts with your account, no card needed.

Is the MCP server different from the API?

No, only the way in. Cotlet builds each integration as a REST API and puts an MCP server on top, so both have the same 12 tools, the same inputs and answers, one API key and one price. AI agents such as Claude, ChatGPT or Cursor use MCP; scripts, cron jobs and HTTP steps in n8n, Make or Zapier use the REST API.

What is the Cloud Browser?

Your own Chrome that Cotlet runs for you in the EU, around the clock. You open it from the console, sign in to SimpleTexting yourself and press Enable for agents. Your agent's calls go through it, from its IP with its cookies, so SimpleTexting sees the browser you signed in with. Password saving is off and the profile is stored encrypted with AES-256-GCM.

Can my agent act without asking me?

Not on anything that reaches other people: send_message, schedule_message, schedule_campaign, add_contact_to_list wait for your OK by default. You can switch that off per tool for scheduled runs.

Does my agent text people who did not agree to it?

Cotlet does not add consent. SimpleTexting tells you to have express consent before you text contacts, and your agent works on the lists and segments you name. Say in the prompt which rows count as consent, and keep the confirmation on for send and campaign tools.

Which countries does it cover?

SimpleTexting serves businesses in the US and Canada, and its API page names the US, Canada, Puerto Rico and some Caribbean countries as coverage. Your agent works in the account you sign in to, so the same limits apply.

Should I use a SimpleTexting MCP server from GitHub instead?

Pick one if you want the code on your own computer and do not mind the upkeep: you install it, sign it in and fix it when SimpleTexting changes. Pick Cotlet if you want it hosted and kept working for you.

Can I use it in n8n, Make or Zapier?

Yes. Add https://cotlet.dev/mcp/v1 in n8n's MCP Client node, or call the REST endpoints from an HTTP step in Make or Zapier.

Who runs Cotlet?

Cotlet is run by Take Group, a Polish software company working since 2019. Take Group runs about 3,200 websites on its own systems and has its own DevOps team for infrastructure security. We built and used integrations like this inside the company for years before opening them as Cotlet.

Is Cotlet affiliated with SimpleTexting?

No. Cotlet is independent and not affiliated with SimpleTexting.

Give your agent access to SimpleTexting.

Free 7-day trial with 2,000 credits, no card needed.

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