# Postcoder, free: Email verification API

> Postcoder checks and validates email addresses in real-time as soon as they're typed into your form. Block incorrect or fraudulent signups, and capture real and deliverable email addresses from genuine customers.

Postcoder's email verification API on its Free trial plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Deliverability, Confidence.
We rank 3,227 plans by price. [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.
[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.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/postcoder/free
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://postcoder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://ws.postcoder.com/pcw/{apikey}/email/{email}`
- API key: with the plan, on https://postcoder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://postcoder.com/docs/email-validation/email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Postcoder (https://postcoder.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Deliverability: ✓
- Confidence: ✓

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: autocomplete/retrieve · address · reversegeo · position · udprn · street · nyb · ipaddress · ngd/retrieve · ngd · pafaddressbase · addressbase · addressbase/uprn · addressbase/dpa · addressbase/lpi · mobile · bank · bank/sortcode · bank/iban · otp/send

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Postcoder checks and validates email addresses in real-time as soon as they're typed into your form. Block incorrect or fraudulent signups, and capture real and deliverable email addresses from genuine customers.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, mailbox
- Keep data: until the licence ends (12 months from acceptance, or sooner when the credit pack is used up or expires or the monthly plan is cancelled), then destroy all copies and confirm it in writing within 7 days
- Use data: your own internal business use, or inside a product or service you sell to your own clients if you enforce Postcoder's end-user terms on them and give Postcoder each client's company details and usage summary, legal purposes only, API calls only for requests people start in real time (e.g. a website form), not a batch script working through a database, unless agreed in writing

## Plan

- Pay: £0
- Expires: 30 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 0.86 s

## The call

- You send: email. Optional: identifier, timeout
- Method: GET
- Path: /pcw/{apikey}/email/{email}

## About the plan

- Plan: Free trial
- Who can get it: anyone

## The 6 fields the plan's answer can hold

warning, state, valid, score, processing time, did you mean

## Postcoder's plans (20)

- [Postcoder, free](https://datacircle.dev/validate-email-apis/postcoder/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [Postcoder, £27 pack](https://datacircle.dev/validate-email-apis/postcoder/27-pack/llms.txt): $86.411 per 1,000, 33% complete, live
- [Postcoder, £35 pack](https://datacircle.dev/validate-email-apis/postcoder/35-pack/llms.txt): $56.007 per 1,000, 33% complete, live
- [Postcoder, £65 pack](https://datacircle.dev/validate-email-apis/postcoder/65-pack/llms.txt): $52.007 per 1,000, 33% complete, live
- [Postcoder, £148 pack](https://datacircle.dev/validate-email-apis/postcoder/148-pack/llms.txt): $47.366 per 1,000, 33% complete, live
- [Postcoder, £256 pack](https://datacircle.dev/validate-email-apis/postcoder/256-pack/llms.txt): $40.965 per 1,000, 33% complete, live
- [Postcoder, £455 pack](https://datacircle.dev/validate-email-apis/postcoder/455-pack/llms.txt): $36.405 per 1,000, 33% complete, live
- [Postcoder, £987 pack](https://datacircle.dev/validate-email-apis/postcoder/987-pack/llms.txt): $31.588 per 1,000, 33% complete, live
- [Postcoder, £1,802 pack](https://datacircle.dev/validate-email-apis/postcoder/1802-pack/llms.txt): $28.836 per 1,000, 33% complete, live
- [Postcoder, £3,319 pack](https://datacircle.dev/validate-email-apis/postcoder/3319-pack/llms.txt): $26.555 per 1,000, 33% complete, live
- [Postcoder, £46 monthly](https://datacircle.dev/validate-email-apis/postcoder/46-monthly/llms.txt): $36.805 per 1,000, 33% complete, live
- [Postcoder, £95 monthly](https://datacircle.dev/validate-email-apis/postcoder/95-monthly/llms.txt): $30.404 per 1,000, 33% complete, live
- [Postcoder, £167 monthly](https://datacircle.dev/validate-email-apis/postcoder/167-monthly/llms.txt): $26.723 per 1,000, 33% complete, live
- [Postcoder, £233 monthly](https://datacircle.dev/validate-email-apis/postcoder/233-monthly/llms.txt): $24.856 per 1,000, 33% complete, live
- [Postcoder, £296 monthly](https://datacircle.dev/validate-email-apis/postcoder/296-monthly/llms.txt): $23.683 per 1,000, 33% complete, live
- [Postcoder, £530 monthly](https://datacircle.dev/validate-email-apis/postcoder/530-monthly/llms.txt): $21.203 per 1,000, 33% complete, live
- [Postcoder, £642 monthly](https://datacircle.dev/validate-email-apis/postcoder/642-monthly/llms.txt): $20.547 per 1,000, 33% complete, live
- [Postcoder, £946 monthly](https://datacircle.dev/validate-email-apis/postcoder/946-monthly/llms.txt): $20.184 per 1,000, 33% complete, live
- [Postcoder, £1,261 monthly](https://datacircle.dev/validate-email-apis/postcoder/1261-monthly/llms.txt): $20.178 per 1,000, 33% complete, live
- [Postcoder, contact us](https://datacircle.dev/validate-email-apis/postcoder/contact-us/llms.txt): 33% complete, live

## Postcoder's calls for this API (1)

- `GET /pcw/{apikey}/email/{email}`: [Postcoder, free](https://datacircle.dev/validate-email-apis/postcoder/free/llms.txt)

## Postcoder's APIs (2)

- [Postcoder: email verification API pricing, 20 plans](https://datacircle.dev/validate-email-apis/postcoder/free/llms.txt)
- [Postcoder: phone validation API pricing, 20 plans](https://datacircle.dev/validate-phone-apis/postcoder/free/llms.txt)

## Postcoder: email verification API alternatives

- [Fiber AI, $300 monthly](https://datacircle.dev/validate-email-apis/fiber-ai/300-monthly/llms.txt): $20.00 per 1,000, 50% complete, live
- [Clearout, $400 pack, 100,000 credits, POST /email_verify/instant, Instant Verify, full](https://datacircle.dev/validate-email-apis/clearout/400-pack-100000-credits-post-email-verify-instant-instant-verify-full/llms.txt): $20.00 per 1,000, 50% complete, live
- [Bytemine, $500 monthly, Growth, POST /emails/verify/single](https://datacircle.dev/validate-email-apis/bytemine/500-monthly-growth-post-emails-verify-single/llms.txt): $20.00 per 1,000, 33% complete, live
- [Dropcontact, €199 monthly](https://datacircle.dev/validate-email-apis/dropcontact/199-monthly/llms.txt): $20.358 per 1,000, 33% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

- https://admin.postcoder.com/downloads/Licence-Agreement-v28.2.0.pdf?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/docs/credit-costs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/docs/email-validation/email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/docs/troubleshooting?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/email-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/payments-billing-compliance?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://postcoder.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing