Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Description from the maker (original English)
Read rapidmail lists, recipients, mailings and stats; add, update or unsubscribe one recipient.
These three are never merged into one score: opinions, measurements and popularity are different things.
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
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Works in Claude on the web, desktop and mobile:
https://rapidmail.usefulapi.io/mcpRun this in your terminal
claude mcp add --transport http rapidmail https://rapidmail.usefulapi.io/mcpPaste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"rapidmail": {
"url": "https://rapidmail.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": {
"rapidmail": {
"type": "http",
"url": "https://rapidmail.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://rapidmail.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.
rapidmail_list_recipientlistsList the recipient lists (newsletter audiences) of the rapidmail account with id, name, description, whether unsubscribed recipients are blacklisted, and which is the default. Use the ids for recipients and mailing filters. GET /recipientlists.
rapidmail_get_recipientlistOne recipient list by id. GET /recipientlists/{id}.
rapidmail_get_recipientlist_activity_statsSubscription activity of one recipient list between two dates (for example new subscriptions and unsubscriptions). The range may be at most one year, must not start before the list was created and must not lie in the future. GET /recipientlists/{id}/stats/activity.
rapidmail_list_recipientsList the recipients (subscribers) of ONE recipient list, optionally filtered by e-mail address, external id or status. recipientlist_id is required. The long text fields (extrabig1-10) are only returned with include_extrabig. GET /recipients.
rapidmail_get_recipientOne recipient by id: e-mail, name, status, custom fields and timestamps. GET /recipients/{id}.
rapidmail_create_recipientWRITE: add ONE recipient (subscriber) to a recipient list. By default double opt-in is used: the recipient is created with status 'new' and rapidmail sends ONE confirmation e-mail to that address; they only receive newsletters after confirming. Set double_opt_in=false only if you
rapidmail_update_recipientWRITE: partially update ONE recipient (only the fields you pass change): e-mail, name, custom fields. The status and the recipient list cannot be changed here, and no e-mail is sent. An e-mail address that already exists in the list returns a conflict error. PATCH /recipients/{id
rapidmail_unsubscribe_recipientWRITE: remove ONE recipient from their list. rapidmail only soft-deletes the record (status 'deleted', as if the person had unsubscribed) and the statistics count it as an unsubscription. No goodbye e-mail is sent. Single recipient only. DELETE /recipients/{id}.
rapidmail_list_mailingsList newsletters (mailings) with status, subject, sender, send time, recipient count and recipient lists. Filter by status, recipient list, created / updated / sent date. Read only: mailings are never created, sent or scheduled by this server. GET /mailings.
rapidmail_get_mailingOne mailing by id: status, subject, sender, destinations (recipient lists), send time, size and attachments. GET /mailings/{id}.
rapidmail_get_mailing_statsStatistics of one sent mailing (opens, clicks, bounces, unsubscriptions and similar totals). GET /mailings/{id}/stats.
rapidmail_list_mailing_activityThe recipients a mailing went to and what each did (delivered, opened, clicked, bounced). Detailed event information is only available if the respective plugin is enabled in the rapidmail account. GET /mailings/{id}/stats/activity.
rapidmail_get_mailing_recipient_activityDelivery and engagement details of one recipient of one mailing. GET /mailings/{id}/stats/activity/{mailingrecipient_id}.
rapidmail_list_mailing_foldersThe folders used to organise mailings, with id and name. GET /mailings/folders.
rapidmail_list_blacklistThe account's blacklist: e-mail addresses, domains and patterns that never receive mailings, with their type, source and dates. GET /blacklist.
rapidmail_list_transactional_emailsTransactional (SMTP) e-mails sent through the rapidmail account: sender, recipient, subject, status (queued, delivered, bounced...), delivery diagnostics and open/click counts. Metadata only, no message bodies. Filter by date, status, project or address. GET /trx/emails.
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 16 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 (1.22.3) 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, FOGA node
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.
Use rapidmail from Claude, Cursor, or any MCP client — recipient lists, recipients, mailings, statistics, the blacklist and transactional mail logs, plus single-recipient writes. Hosted, no local install: connect with your own rapidmail credentials.
Live endpoint: https://rapidmail.usefulapi.io/mcp · Homepage: https://usefulapi.io/rapidmail
https://rapidmail.usefulapi.io/mcp.claude mcp add --transport http rapidmail https://rapidmail.usefulapi.io/mcp, then run /mcp to log in.{
"mcpServers": { "rapidmail": { "url": "https://rapidmail.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 rapidmail credentials.
Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/rapidmail/
| Tool | Type | What it does |
|---|---|---|
rapidmail_list_recipientlists | read | List recipient lists |
rapidmail_get_recipientlist | read | Get recipient list |
rapidmail_get_recipientlist_activity_stats | read | Get recipient list activity stats |
rapidmail_list_recipients | read | List recipients |
rapidmail_get_recipient | read | Get recipient |
rapidmail_create_recipient | write | Add recipient |
rapidmail_update_recipient | write | Update recipient |
rapidmail_unsubscribe_recipient | write | Unsubscribe recipient |
rapidmail_list_mailings | read | List mailings |
rapidmail_get_mailing | read | Get mailing |
rapidmail_get_mailing_stats | read | Get mailing statistics |
rapidmail_list_mailing_activity | read | List mailing recipient activity |
rapidmail_get_mailing_recipient_activity | read | Get one recipient's activity in a mailing |
rapidmail_list_mailing_folders | read | List mailing folders |
rapidmail_list_blacklist | read | List blacklist entries |
rapidmail_list_transactional_emails | read | List transactional e-mails |
rapidmail_usage_status | meta | Usage status (free-tier meter) |
rapidmail_request_feature | meta | Request a missing feature |
rapidmail_upgrade | meta | Upgrade to Pro or Pro+ |
rapidmail_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 (per user) | $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 rapidmail_upgrade (it returns a Stripe Checkout link). Cancel any time with rapidmail_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running rapidmail_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
MIT © usefulapi. Not affiliated with or endorsed by rapidmail.