# Textline MCP by usefulapi (remote · textline.usefulapi.io)

Read Textline conversations, contacts and reports; send a text, add notes, resolve or transfer.

- Trust score: 66/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `textline.usefulapi.io`: 66/100 (this document), [markdown](https://verifymcp.io/servers/io-usefulapi-textline/textline.md), [page](https://verifymcp.io/servers/io-usefulapi-textline/textline)

## Channel facts

- Endpoint: `https://textline.usefulapi.io/mcp`
- Transports: `streamable-http`
- Auth: `required`
- Version: `1.2.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Endpoint Security**: 78/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.
  - HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
  - The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents.
- **Transport & Reachability**: 0/100
  - Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly.
- **Schema Quality & AI Usability**: 83/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2710 tokens (~117/item across 23 items; 23 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - All 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.
  - An AI judge read all 24 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Textline MCP by usefulapi server?

Textline MCP by usefulapi is a hosted endpoint at https://textline.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http io-usefulapi-textline 'https://textline.usefulapi.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-usefulapi-textline": {
      "url": "https://textline.usefulapi.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-usefulapi-textline": {
      "type": "http",
      "url": "https://textline.usefulapi.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-usefulapi-textline]
url = "https://textline.usefulapi.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-usefulapi-textline": {
      "type": "remote",
      "url": "https://textline.usefulapi.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-usefulapi-textline --url 'https://textline.usefulapi.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-usefulapi-textline:
    url: "https://textline.usefulapi.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-usefulapi-textline": {
      "Transport": "http",
      "Url": "https://textline.usefulapi.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-usefulapi-textline -t streamable-http -u 'https://textline.usefulapi.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-usefulapi-textline": {
      "type": "http",
      "url": "https://textline.usefulapi.io/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-17 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-15 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-14 (score 64, +2)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional] The server now declares the “prompts” capability
- [functional] First check of Schema quality: 100
- [functional] New prompt “getting_started”
- [functional] Server version: 1.4.0 → 1.5.0

### 2026-10-12 (score 62, +1)

- [functional improvement] Stability: unverified → 0.07

### 2026-10-10 (score 61)

First indexed and scored.

## MCP tools (23)

### `textline_list_conversations` (~126 tokens)

List conversations

List conversations (one per contact) in a department of the Textline shared inbox, with the contact and resolved status. Optional keyword search. GET /api/conversations.json.

Input parameters:

- `group_uuid` (string): Department (group) UUID from textline_list_departments. Default: the first department.
- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 50).
- `query` (string): Keyword to search conversations on (name, phone, message text).

### `textline_get_conversation` (~140 tokens)

Get conversation messages

Retrieve 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 /api/conversation/{uuid}.json.

Input parameters:

- `after_uuid` (string): Only posts after this post uuid (exclusive).
- `before_uuid` (string): Only posts before this post uuid (exclusive).
- `conversation_uuid` (string, required): Conversation UUID.
- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 50).

### `textline_get_conversation_by_phone` (~166 tokens)

Get conversation by phone number

Retrieve the conversation with a phone number (in a department) and its posts (messages). GET /api/conversations.json?phone_number=….

Input parameters:

- `after_uuid` (string): Only posts after this post uuid (exclusive).
- `before_uuid` (string): Only posts before this post uuid (exclusive).
- `group_uuid` (string): Department (group) UUID from textline_list_departments. Default: the first department.
- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 50).
- `phone_number` (string, required): The contact's phone number, e.g. +14155550123 or (415) 555-0123.

### `textline_list_customers` (~105 tokens)

Search contacts

List or search contacts (customers) in the Textline address book: name, phone, email, tags, notes, custom fields, consent and reachability. GET /api/customers.json.

Input parameters:

- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 50).
- `query` (string): Keyword to search on (name, phone, email, tag).

### `textline_get_customer` (~45 tokens)

Get contact

Retrieve one contact (customer) from the address book by UUID. GET /api/customer/{uuid}.json.

Input parameters:

- `customer_uuid` (string, required): Contact (customer) UUID.

### `textline_get_customer_by_phone` (~50 tokens)

Get contact by phone number

Retrieve one contact (customer) from the address book by phone number. GET /api/customers.json?phone_number=….

Input parameters:

- `phone_number` (string, required): The contact's phone number.

### `textline_list_custom_fields` (~45 tokens)

List contact custom fields

List the address book's custom fields (name, data type, UUID). Use the UUIDs with textline_update_customer. GET /api/address_book/custom_fields.json.

### `textline_list_saved_searches` (~41 tokens)

List saved searches

List the address book's saved searches (contact segments) with name, description and UUID. GET /api/address_book/saved_searches.json.

### `textline_get_organization` (~57 tokens)

Get organization

Retrieve the organization (account) name, optionally with its departments and agents. GET /api/organization.json.

Input parameters:

- `include_groups` (boolean): Include the departments.
- `include_users` (boolean): Include the agents (users).

### `textline_list_departments` (~56 tokens)

List departments

List 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. GET /api/groups.json.

### `textline_list_agents` (~47 tokens)

List agents

List the agents (users) in the organization: name, email, UUID, permission level, availability and department UUIDs. GET /api/organization.json?include_users=1.

### `textline_get_agent` (~59 tokens)

Get agent

Retrieve one agent (user) by UUID or email: name, permission level, availability (on_call) and departments. GET /api/users.json.

Input parameters:

- `email` (string): Agent email.
- `user_uuid` (string): Agent UUID.

### `textline_list_dispositions` (~60 tokens)

List dispositions

List the dispositions (resolution reasons) set up in the account, optionally for one department. Use a UUID with textline_resolve_conversation. GET /api/dispositions.json.

Input parameters:

- `group_uuid` (string): Only dispositions of this department.

### `textline_list_surveys` (~36 tokens)

List surveys

List surveys (NPS, CSAT, custom) with their type and UUID. GET /api/surveys.json.

### `textline_list_survey_responses` (~93 tokens)

List survey responses

List the responses to one survey (ratings, follow-up text, contact, tags). Default: the last 30 days. GET /api/survey/{uuid}/responses.json.

Input parameters:

- `end_date` (string): Last day, YYYY-MM-DD.
- `start_date` (string): First day, YYYY-MM-DD.
- `survey_uuid` (string, required): Survey UUID from textline_list_surveys.

### `textline_report_conversations` (~322 tokens)

Report conversations by date

Reporting 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. GET /api/reporting/conversations.json.

Input parameters:

- `archived` (boolean): Only archived (true) or unarchived (false) contacts. Default: both.
- `blocked` (boolean): Only blocked (true) or unblocked (false) contacts. Default: both.
- `created_after` (string): Created after this ISO date-time (with timezone).
- `created_before` (string): Created before this ISO date-time (with timezone).
- `group_uuid` (string): Department UUID (required unless search_uuid is given).
- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 30).
- `resolved` (boolean): Only resolved (true) or unresolved (false) conversations.
- `search_uuid` (string): Continue an earlier result set: next.search_uuid from a previous call (with next.page and next.page_size).
- `sort_by` (string): Sort field (default created_at).
- `sort_order` (string): Sort order (default desc).
- `updated_after` (string): Updated after this ISO date-time (with timezone).
- `updated_before` (string): Updated before this ISO date-time (with timezone).

### `textline_report_posts` (~197 tokens)

Report posts of a conversation

Reporting 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. GET /api/reporting/conversation/{uuid}/posts.json.

Input parameters:

- `conversation_uuid` (string, required): Conversation UUID.
- `created_after` (string): Created after this ISO date-time (with timezone).
- `created_before` (string): Created before this ISO date-time (with timezone).
- `page` (integer): Page number, 0-based (default 0).
- `page_size` (integer): Results per page (default 30, max 30).
- `search_uuid` (string): Continue an earlier result set: next.search_uuid from a previous call (with next.page and next.page_size).
- `sort_order` (string): Sort order (default desc).

### `textline_send_message` (~205 tokens)

Send SMS message

SENDS 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. POST /api/conversation/{uuid}.json or POST /api/conversations.json.

Input parameters:

- `attachment_urls` (array): Public https URLs of files to attach (makes it an MMS).
- `body` (string, required): The message text the customer will receive.
- `conversation_uuid` (string): The conversation UUID (pass this OR phone_number).
- `group_uuid` (string): With phone_number only: the department to use. Default: the first department.
- `phone_number` (string): The contact's phone number (pass this OR conversation_uuid); opens the conversation if there is none.
- `resolve` (boolean): Resolve the conversation after sending.

### `textline_add_whisper` (~158 tokens)

Add internal note (whisper)

WRITE: 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.

Input parameters:

- `body` (string, required): The note text (visible to agents only).
- `conversation_uuid` (string): The conversation UUID (pass this OR phone_number).
- `group_uuid` (string): With phone_number only: the department to use. Default: the first department.
- `phone_number` (string): The contact's phone number (pass this OR conversation_uuid); opens the conversation if there is none.
- `resolve` (boolean): Resolve the conversation after adding the note.

### `textline_resolve_conversation` (~75 tokens)

Resolve conversation

WRITE: mark a conversation resolved (closed), optionally with a disposition from textline_list_dispositions. Nothing is sent to the customer. POST /api/conversation/{uuid}/resolve.json.

Input parameters:

- `conversation_uuid` (string, required): Conversation UUID.
- `disposition_uuid` (string): Disposition (resolution reason) UUID.

### `textline_transfer_conversation` (~92 tokens)

Transfer conversation

WRITE: assign a conversation to another agent of the same department, by agent UUID or email (one of them). Nothing is sent to the customer. POST /api/conversation/{uuid}/transfer.json.

Input parameters:

- `assignee` (string): The agent's email.
- `conversation_uuid` (string, required): Conversation UUID.
- `user_uuid` (string): The agent's UUID (from textline_list_agents).

### `textline_create_customer` (~112 tokens)

Create contact

WRITE: add a contact (customer) to the Textline address book. Sends nothing to the contact. POST /api/customers.json.

Input parameters:

- `email` (string): Email address.
- `name` (string): Full name.
- `notes` (string): Notes on the contact (replaces the existing notes).
- `phone_number` (string, required): The contact's phone number.
- `tags` (array): Tags, e.g. ['VIP', 'new_lead'] (underscores instead of spaces).

### `textline_update_customer` (~216 tokens)

Update contact

WRITE: 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. PUT /api/customer/{uuid}.json.

Input parameters:

- `custom_fields` (object): Custom field values keyed by custom-field UUID, e.g. {"c43a1766-47e1-4c9c-a2cc-36bf424fcbc0": "Gold"}.
- `customer_uuid` (string, required): Contact (customer) UUID.
- `email` (string): Email address.
- `name` (string): Full name.
- `notes` (string): Notes on the contact (replaces the existing notes).
- `tags` (array): Tags, e.g. ['VIP', 'new_lead'] (underscores instead of spaces).
- `tags_handling` (string): How to apply tags: add, remove or replace (Textline's default if omitted).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-usefulapi-textline/textline#diagnostics

## Score history

- 2026-10-18: 66
- 2026-10-17: 66
- 2026-10-16: 65
- 2026-10-15: 65
- 2026-10-14: 64
- 2026-10-13: 62
- 2026-10-12: 62
- 2026-10-10: 61

## Common questions

### What is the Textline MCP by usefulapi server?

Textline MCP by usefulapi is listed in the public MCP registry as io.usefulapi/textline. Read Textline conversations, contacts and reports; send a text, add notes, resolve or transfer. This page covers its hosted endpoint (https://textline.usefulapi.io/mcp).

### Is the Textline MCP by usefulapi server safe to use?

Textline MCP by usefulapi scores 66 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Textline MCP by usefulapi server expose?

Textline MCP by usefulapi exposes 23 tools: textline_list_conversations, textline_get_conversation, textline_get_conversation_by_phone, textline_list_customers, textline_get_customer, and 18 more. Their descriptions and schemas cost roughly 2,503 tokens of context every time the server is loaded.

### Does the Textline MCP by usefulapi server require authentication?

Yes. Textline MCP by usefulapi asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.

### Is the Textline MCP by usefulapi server still maintained?

Textline MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://textline.usefulapi.io/mcp
- Repository: https://github.com/m190/usefulapi-mcp
- Website: https://usefulapi.io/textline/
- Changelog RSS feed: https://verifymcp.io/servers/io-usefulapi-textline/textline.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-usefulapi-textline/textline.json
- HTML version of this page: https://verifymcp.io/servers/io-usefulapi-textline/textline