io.usefulapiPublished by usefulapi.ioOfficial publisherv1.7.4Updated Nov 7, 2026
MCP server for NeverBounce — business email verification, credits and bulk jobs.
The publisher's own server: Ably MCP by usefulapi
Hosted NeverBounce server that lets an assistant verify email addresses, run and inspect bulk verification jobs, and check credits.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/io.usefulapi%2Fneverbounce/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.Add this to your client's mcpServers config.
{
"mcpServers": {
"neverbounce-by-usefulapi": {
"type": "http",
"url": "https://neverbounce.usefulapi.io/mcp"
}
}
}Connect your NeverBounce account.
https://neverbounce.usefulapi.io/mcp.claude mcp add --transport http neverbounce https://neverbounce.usefulapi.io/mcp, then run /mcp to log in.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 NeverBounce credentials.
Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/neverbounce/
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.
*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this server only. Subscribe with neverbounce_upgrade (it returns a Stripe Checkout link). Cancel any time with neverbounce_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running neverbounce_upgrade before then undoes the cancel. Or write to [email protected].
MIT
Source: servers/neverbounce/README.md at commit 4046075
Get account info and credits
Credits left (paid and free), credits used, and how many verification jobs are completed, queued, processing or under review. Free: it spends no credits. POST /account/info.
Takes no parameters.
Verify one email address
WRITE: SPENDS 1 of your NeverBounce credits per call. Verifies ONE e-mail address and returns result (valid, invalid, disposable, catchall or unknown), flags (e.g. has_dns_mx, role_account, free_email_host), a suggested correction for typos like gmal.com, and optionally the parsed address parts. NeverBounce's usage rules: use this for a single address at the point of entry; do NOT call it in a loop over a list or database (the account can be locked) - use neverbounce_create_job for lists. POST /single/check.
emailrequiredtimeoutaddress_infoList verification jobs
Bulk verification jobs of the account (most recent first as NeverBounce returns them) with id, status, filename, timestamps, totals per result (valid, invalid, catchall, disposable, unknown, duplicates, bad_syntax), bounce estimate and percent complete. Filter by id, exact filename or status. POST /jobs/search.
pagejob_idfilenamejob_statusitems_per_pageGet job status
One verification job: status (waiting, parsing, running, complete, failed, under_review...), failure reason, timestamps, totals (records, billable = credits it will use, processed, valid, invalid, catchall, disposable, unknown, duplicates, bad_syntax), bounce estimate and percent complete. Poll this until status is complete. POST /jobs/status.
job_idrequiredGet job results (paged)
Per-address results of a job: the submitted row (data) and its verification (result, flags, suggested_correction, address info). Paged; use neverbounce_download_job_results for a CSV. The job must be complete. POST /jobs/results.
pagejob_idrequireditems_per_pageDownload job results as CSV
The results of a complete job as CSV text (the submitted columns plus email_status), cut at 200000 characters with a note when longer (use neverbounce_get_job_results to page through large jobs). By default every result type is included; set a type to false to leave it out. POST /jobs/download.
job_idrequiredvalidsinvalidsunknownscatchallsdisposablesCreate a bulk verification job
WRITE: creates a bulk verification job from up to 100 e-mail addresses given in this call, and has NeverBounce parse it. It does NOT start the verification and spends NO credits; run neverbounce_start_job afterwards (that spends 1 credit per billable address). Put ALL the addresses of one list into ONE job: NeverBounce's rules allow 10 concurrent jobs and 50 runs a day, and many small jobs in a short time can get the account locked. Returns the job_id. POST /jobs/create.
emailsrequiredfilenameleverage_historical_dataStart a verification job
WRITE: STARTS a created job and SPENDS 1 credit per billable address (shown as total.billable in neverbounce_get_job); it cannot be stopped or undone. Safety: you must pass max_credits, and the job is refused when its billable count is above it or above 1000 (start bigger jobs in the NeverBounce dashboard). The job must be in status waiting or waiting_analyzed. With run_sample true it only runs the free sample analysis (estimated bounce rate) and spends nothing. POST /jobs/start.
job_idrequiredrun_samplemax_creditsrequired100% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
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{ "mcpServers": { "neverbounce": { "url": "https://neverbounce.usefulapi.io/mcp" } }}