# fittings.sh, pay as you go: Email verification API

> RFC 5322 syntax check, live MX resolution and a disposable-provider check for one email address, in a single call.

fittings.sh's Pay per call over x402 plan for the email verification API costs $3.00 per 1,000 emails. We check each provider's docs for 6 fields. fittings.sh's docs list 1: Deliverability.
We haven't run fittings.sh through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,468 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. This plan costs less per 1,000 emails than 37% of the 4,468 plans.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/fittings-sh/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://fittings.sh/catalog/email.deliverability?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://fittings.sh/v1/email/deliverability`
- API key: not needed
- Its API docs: https://fittings.sh/catalog/email.deliverability?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: fittings.sh (https://fittings.sh?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

- $ per 1,000 emails: $3.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: RFC 5322 syntax check, live MX resolution and a disposable-provider check for one email address, in a single call.

## Data

- What it checks: format, mail servers, disposable domains
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /v1/email/deliverability

## About the plan

- Plan: Pay per call over x402
- Who can get it: anyone with a USDC wallet on Base, no account, API key or sign-up

## The 5 fields the plan's answer can hold

verdict, syntax valid, accepts mail, disposable, MX records

## fittings.sh's plans (1)

- [fittings.sh, pay as you go](https://datacircle.dev/validate-email-apis/fittings-sh/pay-as-you-go/llms.txt): $3.00 per 1,000, 17% complete

## fittings.sh's calls for this API (1)

- `GET /v1/email/deliverability`: [fittings.sh, pay as you go](https://datacircle.dev/validate-email-apis/fittings-sh/pay-as-you-go/llms.txt)

## fittings.sh's APIs (6)

- [fittings.sh: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/fittings-sh/pay-as-you-go/llms.txt)
- [fittings.sh: company hierarchy API pricing, 1 plan](https://datacircle.dev/company-hierarchy-apis/fittings-sh/pay-as-you-go/llms.txt)
- [fittings.sh: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/fittings-sh/pay-as-you-go/llms.txt)
- [fittings.sh: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/fittings-sh/pay-as-you-go/llms.txt)
- [fittings.sh: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/fittings-sh/pay-as-you-go/llms.txt)
- [fittings.sh: company enrichment API pricing, 1 plan, GET /v1/vat/eu-validate](https://datacircle.dev/company-enrichment-apis/fittings-sh/pay-as-you-go-pay-per-call-over-x402-get-v1-vat-eu-validate/llms.txt)
- [fittings.sh: company enrichment API pricing, 1 plan, GET /v1/lei/lookup](https://datacircle.dev/company-enrichment-apis/fittings-sh/pay-as-you-go-pay-per-call-over-x402-get-v1-lei-lookup/llms.txt)

## fittings.sh: email verification API alternatives

- [Prime Verifier, $15 pack, Pay-As-You-Go 5,000 credits, POST /v1/verify/single](https://datacircle.dev/validate-email-apis/prime-verifier/15-pack-pay-as-you-go-5000-credits-post-v1-verify-single/llms.txt): $3.00 per 1,000, 50% complete
- [DeBounce, top-up from $15, 5K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-15-5k-credits-get-v1/llms.txt): $3.00 per 1,000, 50% complete, live
- [OrbiSearch, $30 pack, Starter, POST /v1/bulk](https://datacircle.dev/validate-email-apis/orbisearch/30-pack-starter-post-v1-bulk/llms.txt): $3.00 per 1,000, 50% complete, live
- [ExactVerify, $15 pack, Pay-As-You-Go from 5,000 emails, GET /v1/single](https://datacircle.dev/validate-email-apis/exactverify/15-pack-pay-as-you-go-from-5000-emails-get-v1-single/llms.txt): $3.00 per 1,000, 33% complete, live
- [BESS x402, pay as you go](https://datacircle.dev/validate-email-apis/bess-x402/pay-as-you-go/llms.txt): $3.00 per 1,000, 33% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-10.

- https://fittings.sh?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://fittings.sh/catalog/email.deliverability?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://fittings.sh/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://fittings.sh/skill/finance-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://fittings.sh/skill/web-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing