usefulapiTextline MCP server
Read Textline conversations, contacts and reports; send a text, add notes, resolve or transfer. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Textline connector, then ask in plain words. The AI picks the tools.
- Which text conversations are still open in my main inbox?
- Show the conversation with the number 555-0100.
- Who are the agents on my team and who is on call?
- Add an internal note to the conversation with Jane Smith: needs a quote.
What you can do with Textline in Claude and ChatGPT
For customer support and sales teams who text customers from a shared inbox in Textline.
Find open conversations in an inbox
The AI lists the conversations of a department with contact and resolved status, with an optional keyword search. You see which conversations are unresolved.
Read the conversation with a phone number
The AI opens the conversation with a number and reads its messages, internal whispers and resolve or transfer events.
Look up contacts, agents and survey answers
The AI searches the address book for contacts with tags and notes, lists agents with availability, and lists the responses to a survey.
Report on conversations in a date range
The AI lists a department's conversations by created or updated time and status with a total count, then reads the posts of one conversation.
Reply, add a note, resolve or hand over a conversation
The AI sends a text to one contact, adds an internal note, resolves a conversation with a disposition, or transfers it to another agent.
Changes dataAdd or update a contact in the address book
The AI creates a contact, or changes a contact's name, email, notes, tags or custom fields. Nothing is sent to the contact.
Changes dataHow do I connect Textline?
Before you connect
The login page asks for your Textline API access token.
In Textline go to Settings → Tools & Integrations → Developer API and copy the access token. API access depends on your Textline plan. The server acts as the agent the token belongs to and sees only what that agent may see. Your token is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Textline and this URL, then click Add:https://
textline. usefulapi. io/ mcp - Claude opens the login page: enter your Textline API access token.
- In a chat, click + → Connectors and turn on Textline.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name Textline and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
textline. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Textline API access token.
- In Plugins, install Textline, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"textline": {
"url": "https://textline.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"textline": {
"type": "http",
"url": "https://textline.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Textline API access token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Pricing
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Textline server only. Ask your AI to run textline_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with textline_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with textline_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 27
Show all 27 tools (the AI picks them for you)
Read only · 17
- List conversations
textline_list_conversationsList conversations (one per contact) in a department of the Textline shared inbox, with the contact and resolved status. Optional keyword search. - Get conversation messages
textline_get_conversationRetrieve one conversation and its posts (messages in and out, internal whispers, resolve/transfer events), newest page first. Page with page/page_size or with before_uuid/after_uuid (a post uuid). - Get conversation by phone number
textline_get_conversation_by_phoneRetrieve the conversation with a phone number (in a department) and its posts (messages). - Search contacts
textline_list_customersList or search contacts (customers) in the Textline address book: name, phone, email, tags, notes, custom fields, consent and reachability. - Get contact
textline_get_customerRetrieve one contact (customer) from the address book by UUID. - Get contact by phone number
textline_get_customer_by_phoneRetrieve one contact (customer) from the address book by phone number. - List contact custom fields
textline_list_custom_fieldsList the address book's custom fields (name, data type, UUID). Use the UUIDs with textline_update_customer. - List saved searches
textline_list_saved_searchesList the address book's saved searches (contact segments) with name, description and UUID. - Get organization
textline_get_organizationRetrieve the organization (account) name, optionally with its departments and agents. - List departments
textline_list_departmentsList the departments (groups / inbox phone lines) the token's agent can see: name, UUID, phone number, type (sms, facebook, smart_sms) and member agent UUIDs. - List agents
textline_list_agentsList the agents (users) in the organization: name, email, UUID, permission level, availability and department UUIDs. - Get agent
textline_get_agentRetrieve one agent (user) by UUID or email: name, permission level, availability (on_call) and departments. - List dispositions
textline_list_dispositionsList the dispositions (resolution reasons) set up in the account, optionally for one department. Use a UUID with textline_resolve_conversation. - List surveys
textline_list_surveysList surveys (NPS, CSAT, custom) with their type and UUID. - List survey responses
textline_list_survey_responsesList the responses to one survey (ratings, follow-up text, contact, tags). Default: the last 30 days. - Report conversations by date
textline_report_conversationsReporting API: list a department's conversations filtered by created/updated time, resolved, archived or blocked, with total_records. To get the next page pass the returned next.search_uuid, next.page and next.page_size exactly (the same filters are kept). Then use textline_report_posts per conversation. - Report posts of a conversation
textline_report_postsReporting API: list all posts (messages, whispers) of one conversation with creator, thread, first-response flags, filtered by created time, with total_records. To get the next page pass the returned next.search_uuid, next.page and next.page_size exactly.
Changes data · 6
- Send SMS message
textline_send_messageSENDS A REAL SMS/MMS to ONE contact from your Textline number — the customer receives it immediately and it cannot be unsent; it consumes message credits. Address it by conversation_uuid or by phone_number (+ optional department). Confirm the recipient and text with the user first. One recipient per call; no bulk sends. - Add internal note (whisper)
textline_add_whisperWRITE: add an internal whisper (a note only your agents see, never sent to the customer) to a conversation, by conversation_uuid or phone_number. POST /api/conversation/{uuid}.json or POST /api/conversations.json with a whisper. - Resolve conversation
textline_resolve_conversationWRITE: mark a conversation resolved (closed), optionally with a disposition from textline_list_dispositions. Nothing is sent to the customer. - Transfer conversation
textline_transfer_conversationWRITE: assign a conversation to another agent of the same department, by agent UUID or email (one of them). Nothing is sent to the customer. - Create contact
textline_create_customerWRITE: add a contact (customer) to the Textline address book. Sends nothing to the contact. - Update contact
textline_update_customerWRITE: update a contact's name, email, notes, tags (add, remove or replace) or custom fields (by custom-field UUID from textline_list_custom_fields). Overwrites the fields you pass; sends nothing to the contact.
Your usefulapi plan · 4
- Usage status (free-tier meter)
textline_usage_statusReport the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. - Request a missing feature
textline_request_featureTell usefulapi that the user needs something the Textline tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. - Upgrade to Pro or Pro+
textline_upgradeGet a paid plan for Textline (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
textline_cancel_subscriptionCancel the caller's Textline Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run textline_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Textline in Claude or ChatGPT?
Find open conversations in an inbox. Read the conversation with a phone number. Look up contacts, agents and survey answers. Report on conversations in a date range. Reply, add a note, resolve or hand over a conversation. Add or update a contact in the address book. See what you can do for the details.
Is this an official Textline product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Textline. The server calls the Textline API with your own Textline access, so it sees only the data that your account can see.
Can I connect Textline to Claude or ChatGPT?
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
What do I need to connect?
The login page asks for your Textline API access token. See Before you connect for where to find it.
Do I put my Textline key or an Authorization header in the client config?
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Textline API access token. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
How do you keep my Textline credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Textline API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Textline.
Can the AI change my Textline data?
Yes, if you approve it. 6 of the 23 Textline tools can create or change data. The other 17 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Textline server only. Cancel any time: your paid plan then runs to the end of the paid period. Run textline_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run textline_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run textline_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Textline tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with textline_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Which AI clients can I use?
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.