WarmInboxes Free Deliverability Tools
MCP server · warminboxes.com · found in a public list · checked since 2026-10-23
Live, handshake completed · latest check
https://warminboxes.com/mcp MCP endpoint (Streamable HTTP)The name is the registry's label, not ours. Not reviewed by a person.
Our checks
An unpaid request daily, from eastern North AmericaLast 2 checks, oldest to newest; room for 28 more
2 passed, 0 failed, 28 not run.
Checked daily. Daily: 5 to 99 payers, and every new service until it has been probed 3 times.
Response times
| Window | Checks | Timeouts | Median | 90th | 95th | 99th | Fastest | Slowest |
|---|---|---|---|---|---|---|---|---|
| 24 hours | 1 | 0 | — | — | — | — | — | — |
| 7 dayssince 2026-10-23 | 2 | 0 | — | — | — | — | — | — |
| 30 dayssince 2026-10-23 | 2 | 0 | — | — | — | — | — | — |
Milliseconds, from eastern North America, timing the whole MCP handshake (initialize to the tools/list answer). Timeouts count at the 10000 ms limit. A dash means too few checks for that figure. As of . Definitions and method.
Details
Tools listed by the server
analyze_bouncesanalyze_cold_emailanalyze_dmarc_reportanalyze_email_htmlanalyze_headersanalyze_microsoft_headersaudit_campaignburned_inbox_guidancecheck_bimicheck_blacklistcheck_bulk_sender_requirementscheck_cnamecheck_deliverabilitycheck_dkimcheck_dmarccheck_dnscheck_domain_expirycheck_domain_reputationcheck_email_authenticationcheck_google_domaincheck_mta_stscheck_nameserverscheck_rdnscheck_spfcheck_sslcheck_suppressioncheck_surblcheck_tracking_domainclean_csvcold_email_writing_resourcescombine_csvsconvert_csvexpand_spintaxfind_lead_listsfind_resourcesfind_toolsgenerate_dns_recordsgenerate_unsubscribeget_pricinglookup_mx+11
- Tools
- 51
- This list since
- 2026-10-24
- First listed to us
- 2026-10-24
- List changes, 90 days
- 0
Names as the server reported them at our latest completed handshake (mcp-handshake/2); a listed tool is not a tested one. Definitions
Access
- Our latest check
- Nothing asked
- Stated
- not stated
- Payment model
- not known
- Currency
- not known
"Nothing asked" describes one plain request, not every operation. Statements are claims, not our measurements. Definitions
Interface it declares
- Protocol
- MCP 2025-06-18
- Capabilities
- tools
- Transports
- streamable-http
As its initialize reply stated it at our check on (mcp-handshake/2): a claim, not tested. Definitions
Calls it declares
check_deliverability domain*check_spf domain*check_dkim domain* selectorcheck_dmarc domain*check_bimi domain*check_mta_sts domain*check_ssl domain* portcheck_dns domain* typelookup_txt domain*check_rdns ip*check_blacklist input*check_surbl domains*
From the tool list it returned to our check (request-shape/1). * marks a required parameter; after → the fields it says it returns. What it declares, not that a call works.
Listing
In the capability tree: Messaging and communication / Email (primary). Placed by keyword rules (placement-rules/3, tree/3) on 2026-10-24. Wrong place? Tell us.
In the index only: does not meet every one of our listing criteria (listing-criteria/6): ✗ what it does is unclear to our placement; ✓ its latest check passed.
Recent probes
| When | Result | Time to headers |
|---|---|---|
cloudflare:EWR |
Live, handshake completed HTTP 200 | 1379 ms |
cloudflare:EWR |
Live, handshake completed HTTP 200 | 680 ms |
What these figures do not show
- A passing check means the server completed the MCP handshake with us (initialize, then tools/list, with no credentials; mcp-handshake/2) or asked for credentials first (HTTP 401). It does not show that the server's tools work or what they return. Tool names are as the server listed them.
- Listed in the Official MCP Registry; this data comes from the Official MCP Registry. Its listing's description is not republished.
- Limited evidence: monitored for 1 day (less than 30).
Something wrong here?
Operate this service and want it reviewed, corrected or removed? Email hello@agentservicedirectory.com or use the opt-out page. A wrong place in the tree? Tell us.
Machine-readable: /api/v1/services/cand_23200e2db22d561d