Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Send and read OpenPhone messages, calls, contacts and phone numbers.
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Works in Claude on the web, desktop and mobile:
https://openphone.usefulapi.io/mcpRun this in your terminal
claude mcp add --transport http openphone https://openphone.usefulapi.io/mcpPaste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"openphone": {
"url": "https://openphone.usefulapi.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Paste into .vscode/mcp.json in your project
{
"servers": {
"openphone": {
"type": "http",
"url": "https://openphone.usefulapi.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
https://openphone.usefulapi.io/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.
openphone_list_phone_numbersList the OpenPhone numbers in the workspace (id, number, name, formatted number, assigned users, restrictions). Usually the first call — most other tools need a phoneNumberId. OpenPhone REST: GET /phone-numbers.
openphone_list_usersList workspace users (id, email, name, role). Use to find a userId for scoping other calls. OpenPhone REST: GET /users.
openphone_list_contactsList contacts in the workspace, optionally filtered by external ids or sources. Returns each contact's default fields (name, company, emails, phone numbers) and custom fields. OpenPhone REST: GET /contacts.
openphone_get_contactGet a single contact by its id, including default fields (name, company, role, emails, phone numbers) and custom fields. OpenPhone REST: GET /contacts/{id}.
openphone_get_contact_custom_fieldsList the workspace's contact custom-field definitions (name, key, type). Use the returned keys when creating contacts with custom fields. OpenPhone REST: GET /contact-custom-fields.
openphone_list_conversationsList conversations (threads), most-recent activity first, optionally filtered by phone number(s), user, and created/updated date ranges. Each conversation has participants, assignee, and last-activity metadata. OpenPhone REST: GET /conversations.
openphone_list_messagesList messages in a conversation between one of your OpenPhone numbers and one or more participants. Returns text, direction, status and timestamps. OpenPhone REST: GET /messages.
openphone_get_messageGet a single message by its id (starts with 'AC'). OpenPhone REST: GET /messages/{id}.
openphone_send_messageSend an SMS/text message from one of your OpenPhone numbers to up to 10 recipients. WRITE ACTION — this actually sends a real text message (which may incur carrier cost and requires approved A2P 10DLC registration). OpenPhone REST: POST /messages.
openphone_list_callsList calls between one of your OpenPhone numbers and a participant, newest first, optionally filtered by user and created date range. Returns direction, status, duration and timestamps. OpenPhone REST: GET /calls.
openphone_get_callGet a single call by its id (starts with 'AC') — direction, status, duration, participants and timestamps. OpenPhone REST: GET /calls/{id}.
openphone_get_call_summaryGet the AI-generated summary and next steps for a call by its id. Availability depends on your plan and whether the call was summarized. OpenPhone REST: GET /call-summaries/{callId}.
openphone_get_call_transcriptGet the transcription for a call by its id — dialogue segments with speaker, text and timestamps, plus overall status and duration. OpenPhone REST: GET /call-transcripts/{id}.
openphone_get_call_recordingsGet the recordings for a call by its id — each with a URL, duration, start time and status. OpenPhone REST: GET /call-recordings/{callId}.
openphone_list_webhooksList all webhooks configured in the workspace (id, url, events, status). Read-only inventory — this tool does not create or delete webhooks. OpenPhone REST: GET /webhooks.
openphone_create_contactCreate a new contact in the workspace. WRITE ACTION — this adds a persistent contact record. Emails and phoneNumbers are passed as simple string arrays and stored under default field labels. OpenPhone REST: POST /contacts.
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026
The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)
We have not read this repo from GitHub yet
We have not read this repo from GitHub yet
Responded in 14 ms (HTTP 200)
No sign-in needed
Read 16 tool descriptions and found no hidden instructions to the AI
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
The registry does not list a required key, though some servers ask you to sign in on first use.
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
The GitHub repo last changed –, and the latest version (1.35.3) reached the registry yesterday.
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
In the same category: Spec Driven Development, Remote Desktop Commander, debuff
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Send and read OpenPhone messages, calls, contacts and phone numbers. Hosted, no local install.
Live endpoint: https://openphone.usefulapi.io/mcp · Homepage: https://usefulapi.io
https://openphone.usefulapi.io/mcp.claude mcp add --transport http openphone https://openphone.usefulapi.io/mcp, then run /mcp to log in.{
"mcpServers": { "openphone": { "url": "https://openphone.usefulapi.io/mcp" } } }
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, and the login page asks for your OpenPhone credentials.
Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/openphone/
On first connect you'll paste your OpenPhone credentials. They are validated, stored per-user, and scoped to you — no keys in config files.
| Tool | Type | What it does |
|---|---|---|
openphone_list_phone_numbers | read | List phone numbers |
openphone_list_users | read | List users |
openphone_list_contacts | read | List contacts |
openphone_get_contact | read | Get a contact |
openphone_get_contact_custom_fields | read | Get contact custom fields |
openphone_list_conversations | read | List conversations |
openphone_list_messages | read | List messages |
openphone_get_message | read | Get a message |
openphone_send_message | write | Send a text message |
openphone_list_calls | read | List calls |
openphone_get_call | read | Get a call |
openphone_get_call_summary | read | Get a call summary |
openphone_get_call_transcript | read | Get a call transcript |
openphone_get_call_recordings | read | Get call recordings |
openphone_list_webhooks | read | List webhooks |
openphone_create_contact | write | Create a contact |
openphone_usage_status | meta | Usage status (free-tier meter) |
openphone_request_feature | meta | Request a missing feature |
openphone_upgrade | meta | Upgrade to Pro or Pro+ |
openphone_cancel_subscription | meta | Cancel the Pro subscription |
read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Pro | $9/mo or $90/yr (2 months free) | Unlimited* |
\*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to support@usefulapi.io.
Pro covers this server only. Subscribe with openphone_upgrade (it returns a Stripe Checkout link). Cancel any time with openphone_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running openphone_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
MIT