Find B2B leads with verified work emails, find and verify emails, and run cold email outreach.
Marketing & SalesCommunication & messaging
- Passed: Handshake
- Passed: Tools listed
- Passed: Updated recently
Median latency 173 ms · Last checked
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Evidence for your next connection.
Independent measurements of remote MCP servers. Every observation has a timestamp.
Read-only probesMCP server · Communication & messaging
Cold email for agencies: SPF, DKIM, DMARC, blacklist checks, plus campaigns and replies.
0 failed · 7 not measured
Median of successful probes over 7 days
Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.
Tool definitions returned by this server
Independent monitoring
Responded
The server completed its last measured handshake. This is an observation, not a guarantee.
Last checked| Test area | Passed | Failed | Unmeasured |
|---|---|---|---|
ConnectionCan a client connect and discover tools? | 5 | 0 | 0 |
Reliability & speedDoes it respond consistently and quickly? | 1 | 0 | 3 |
Access & authenticationWhat is required to use this server? | 1 | 0 | 2 |
Tool qualityAre the tool definitions usable by an agent? | 4 | 0 | 0 |
Publisher identityCan the publisher be traced to its source? | 4 | 0 | 2 |
Unmeasured means there is not enough evidence to decide. How these checks work
Start using Pipefire
Choose your client, copy the configuration, then enable the server in your client’s MCP settings.
Run this command in your terminal, then restart Claude Code.
Claude Code
claude mcp add --transport http pipefire https://pipefire.ai/mcpCapabilities
Overview of this Pipefire account: campaigns running, emails sent and replies this month, interested leads, and replies waiting for an answer. Start here.
DiscoveredRead the raw headers of a received email: SPF, DKIM and DMARC results, alignment, the delivery path and delays. Use when someone pastes headers and asks why a message went to spam or failed authentication.
DiscoveredCheck a domain's BIMI record (logo in the inbox) and whether its DMARC policy is strict enough for BIMI to show.
DiscoveredCheck whether a domain's sending IPs, or a single IPv4 address, are listed on the major email blacklists (Spamhaus, Barracuda, SpamCop and others), with removal links.
DiscoveredScore a cold email (subject and body) out of 10 against the rules Pipefire checks its own emails with: length, reading level, the ask, subject line, and spam-filter wording. Returns each issue with why it matters and how to fix it.
DiscoveredLook up a domain's DKIM public key, trying the selectors Google Workspace, Microsoft 365 and common senders use, plus one you name.
DiscoveredCheck a domain's DMARC record: whether one exists at _dmarc, its policy (none, quarantine, reject), whether reports are collected, and outdated tags. Tells you whether the domain can be impersonated by email.
DiscoveredCheck whether a domain is set up to send and receive email properly: MX, SPF, DKIM and DMARC in one go, each with pass/warn/fail, what was found, and how to fix it. Use when someone asks why their email goes to spam, whether their domain is set up right, or before sending cold email.
DiscoveredCheck a domain's MTA-STS policy, which forces encrypted delivery of incoming mail.
DiscoveredList a domain's mail servers (MX records) and which provider handles its email.
DiscoveredCheck a domain's SPF record: whether it exists, is valid, stays under the 10 DNS lookup limit, and ends with a sensible all mechanism.
DiscoveredWrite a new campaign from a short brief: who to email, where, and what you offer them. Pipefire writes the email sequence (two subject-line versions), starts finding and verifying the businesses, and saves it as a DRAFT. Nothing sends until you launch it. Read it with get_campaign. Takes up to a minute.
DiscoveredThe sending domains and mailboxes on this Pipefire account: which are ready, which are warming (and on what day), how many emails a day they can send, and anything paused or broken. Pipefire buys, sets up and warms these for you.
DiscoveredFormat a DKIM public key as the TXT record to publish at selector._domainkey.yourdomain.
DiscoveredBuild a valid DMARC TXT record (to publish at _dmarc.yourdomain) from a policy and report addresses.
DiscoveredBuild a valid SPF TXT record for a domain from the email services it sends with, with warnings about the 10-lookup limit.
DiscoveredOne campaign in full: its market, how far it has got (found, verified, contacted, replied, interested), the emails it sends (both subject-line versions of email 1), and a sample of the businesses it will email. Use after create_campaign to read what was written.
DiscoveredThe full email thread with one prospect: what was sent, what they replied, and the draft answer if one is waiting. Sending the answer is done in the Pipefire console (link included), never from here.
DiscoveredCheck that a draft campaign has its emails and return the link to it in the Pipefire console, where the user reads the emails and presses Launch themselves. This tool changes nothing and sends nothing.
DiscoveredCheck that a draft answer is waiting on a conversation and return the link to it in the Pipefire console, where the user reads it and presses Approve to send it themselves. This tool changes nothing and sends nothing.
DiscoveredList the likely email address formats for a person at a company domain (first@, first.last@, flast@ ...). Guesses only: verify before sending.
DiscoveredHow far Pipefire has got finding the businesses for one campaign: how many found, how many with an email, how many emails checked, how many owners named, which sources they came from, and the latest businesses found. Use after create_campaign, or when asked how a campaign's list is coming along.
DiscoveredEvery campaign on this Pipefire account with its status, market, people contacted, replies, interested leads, meetings and next send. Use the id with pause_campaign or resume_campaign.
DiscoveredProspect replies that need an answer, oldest first: who, which campaign, what the reply was classified as, a snippet, and whether a draft answer is ready. Use the id with get_conversation.
DiscoveredStop a running campaign. Nothing further sends until it is resumed. Replies still arrive. Reversible with resume_campaign.
DiscoveredAsk Pipefire to rewrite the draft answer to a prospect, with an instruction such as "shorter", "more casual" or "offer to send the list first". Returns the new draft. It does not send: get the approval link with get_reply_approval_link.
DiscoveredWhen a prospect replies yes to a lead list, queue it: local businesses of the types they sell to, around their town, verified, as a spreadsheet and PDF on a private link. Ready in about 30 minutes; the link appears in the conversation and get_conversation. Up to 5 a day.
DiscoveredEmails sent, replies, interested leads and meetings booked between two dates (inclusive). Dates are YYYY-MM-DD. Defaults to the last 30 days.
DiscoveredRestart a campaign you paused. A campaign Pipefire paused to protect your sending reputation cannot be resumed from here; the answer says why.
DiscoveredSuggest lookalike sending domains for cold email (so the main domain is never put at risk), with live .com/.net availability. Give a business name or its website.
DiscoveredScore a cold email subject line out of 10: length, wording that hurts opens, and spam trigger words, with fixes.
DiscoveredRecent measurements
| Checked | Result | Response | Tools |
|---|---|---|---|
| Connected | 356 ms | 31 | |
| Connected | 237 ms | 31 |