# appin60, pay as you go: Tech stack API

> Email intelligence for a company domain: mail provider (Google Workspace, Microsoft 365, Proofpoint...), catch-all status, SaaS tools revealed by SPF (HubSpot, Salesforce, Zendesk, SendGrid...), DMARC policy, public email addresses found on the company's own website with source URLs, and the likely address pattern. Useful before cold outreach or for tech-stack prospecting.

appin60's Pay per call (x402) plan for the tech stack API costs $5.00 per 1,000 companies. appin60's docs list 1 of the 13 fields on our checklist: Technology.
We haven't run appin60 through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
We rank 390 plans for tech stack APIs by price. Half the plans cost $5.663 or less per 1,000 companies. This plan costs less per 1,000 companies than 50% of the 390 plans.
[cl0q's $50 monthly plan](https://datacircle.dev/company-technology-apis/cl0q/50-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: $0.0042. [Enterno's ₽2,511 yearly plan](https://datacircle.dev/company-technology-apis/enterno/2511-yearly-explorer-get-api-v4-cms/llms.txt) costs the least for 10,000 companies a month: about $2.50.
[GetProspect's $49 monthly plan](https://datacircle.dev/company-technology-apis/getprospect/49-monthly/llms.txt) covers any number of companies. GetProspect's $49 monthly plan costs less up front than cl0q's $50 monthly plan.
[JobsPipe](https://datacircle.dev/company-technology-apis/jobspipe/149-monthly-growth-post-v1-stack-scan/llms.txt), [DetectZeStack](https://datacircle.dev/company-technology-apis/detectzestack/79-monthly-mega-get-analyze/llms.txt) and [GetProspect](https://datacircle.dev/company-technology-apis/getprospect/49-monthly/llms.txt) are the best tech stack API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-technology-apis/appin60/pay-as-you-go
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://mailferret.appin60.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://mailferret.appin60.com/domain`
- API key: not needed
- Its API docs: https://mailferret.appin60.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: appin60 (https://mailferret.appin60.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 8%
- Technology: ✓

## Price

- $ per 1,000 companies: $5.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Email intelligence for a company domain: mail provider (Google Workspace, Microsoft 365, Proofpoint...), catch-all status, SaaS tools revealed by SPF (HubSpot, Salesforce, Zendesk, SendGrid...), DMARC policy, public email addresses found on the company's own website with source URLs, and the likely address pattern. Useful before cold outreach or for tech-stack prospecting.

## Data

- Keep data: no API terms
- Use data: Use it for legitimate B2B outreach and list hygiene, and follow anti-spam law (CAN-SPAM, GDPR) when you email anyone.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: POST
- Path: /domain

## About the plan

- Plan: Pay per call (x402)
- Who can get it: anyone, with no account or API key, paying each call in USDC on Base or Arbitrum (x402)

## The 11 fields the plan's answer can hold

status, domain, accepts mail, email provider, catch-all, SaaS tools from SPF, DMARC policy, public emails, public email source, public email role, likely address pattern

## appin60's plans (1)

- [appin60, pay as you go](https://datacircle.dev/company-technology-apis/appin60/pay-as-you-go/llms.txt): $5.00 per 1,000, 8% complete

## appin60's calls for this API (1)

- `POST /domain`: [appin60, pay as you go](https://datacircle.dev/company-technology-apis/appin60/pay-as-you-go/llms.txt)

## appin60's APIs (6)

- [appin60: company enrichment API pricing, 1 plan](https://datacircle.dev/company-enrichment-apis/appin60/pay-as-you-go/llms.txt)
- [appin60: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/appin60/pay-as-you-go/llms.txt)
- [appin60: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/appin60/pay-as-you-go/llms.txt)
- [appin60: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/appin60/pay-as-you-go/llms.txt)
- [appin60: email finder API pricing, 1 plan](https://datacircle.dev/find-email-apis/appin60/pay-as-you-go/llms.txt)
- [appin60: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/appin60/pay-as-you-go/llms.txt)

## appin60: tech stack API alternatives

- [HirePulse, pay as you go](https://datacircle.dev/company-technology-apis/hirepulse/pay-as-you-go/llms.txt): $5.00 per 1,000, 8% complete
- [The Swarm, $72,000 yearly](https://datacircle.dev/company-technology-apis/the-swarm/72000-yearly/llms.txt): $5.00 per 1,000, 38% complete, stored
- [WebLens, pay as you go](https://datacircle.dev/company-technology-apis/weblens/pay-as-you-go/llms.txt): $5.00 per 1,000, 23% complete
- [Exepal, pay as you go](https://datacircle.dev/company-technology-apis/exepal/pay-as-you-go/llms.txt): $5.00 per 1,000, 15% complete, 6 hours
- [Companyfacts, $10 pack](https://datacircle.dev/company-technology-apis/companyfacts/10-pack/llms.txt): $5.00 per 1,000, 8% 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 2026-11-08.

- https://mailferret.appin60.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://mailferret.appin60.com/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://mailferret.appin60.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://mailferret.appin60.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://pitcrew-api.appin60.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://pitcrew-api.appin60.com/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://pitcrew-api.appin60.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://pitcrew-api.appin60.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing