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SpamFixer Email Deliverability Check

MCP server MCP

com.spamfixer · com.spamfixer · Comms & Messaging

not indexed Provider site ↗

Why do a domain's emails go to spam? Checks SPF, DKIM, DMARC, MX and blocklists. Free, no login.

Price — no price published

Calls · 30d — not reported by any source

Buyers · 30d — Observed sending wallets · Base USDC · partial sender history · purchases unverified

Volume · 30d — Observed Base USDC inflows · not attributable or not measured

Inflow growth · 7d — not comparable (baseline under $1 or window incomplete)

Trx · 30d — Observed transfers · not attributable or not measured

Observed inflows · last 30 days

No inflow observed in this window

No payout address is published, so nothing can be observed.

Observed inflows by window for SpamFixer Email Deliverability Check.
Window	Observed	Transfers
Last complete day (2026-11-05)	—	—
Last 7 days	—	—
Last 30 days	—	—
Growth, 7d against the 7 before	not comparable

Source: on-chain transfer scan (USDC on Base) Window: 2026-10-07 → 2026-11-05 Scanned: 30/30 days Sample: 0 days with a measurement First seen: never Last update: 2026-11-05

Daily history →. Observed transfers show value arriving at the payout address; they do not establish service revenue.

Competitors & category benchmark

Rank the whole category →

Closest competitors Comms & Messaging

Email 2,672 calls · 0.03 USDC per call —
Mx lookup 1,196 calls · 0.0216 USDC per call —
Person profile 1,095 calls · 0.001 USDC per call —
Person email status 395 calls · 0.001 USDC per call —
Match 320 calls · 0.01 USDC per call —

Sorted by source-measured calls, not by our opinion. The right-hand figure is observed inflow, which stays empty for peers whose address is shared.

Category benchmark 3,289 services in this category

With a measured call count	975 (29.6 %)
With a published price	1,216 (37.0 %)
With attributable inflows	29 (0.9 %)
Observed inflows · 30d	$72.51
Median measured calls	1
Median price per call	$0.01