# Foundry, pay as you go: Tech stack API

> Website tech stack detector: frameworks, CMS, analytics, CDN and server behind a site. Input: a URL.

Foundry's x402 pay per call plan for the tech stack API costs $1.00 per 1,000 companies. We check each provider's docs for 13 fields. Foundry's docs list 1: Technology.
We haven't run Foundry through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
We rank 450 plans for tech stack APIs by price. Half the plans cost $7.155 or less per 1,000 companies. This plan costs less per 1,000 companies than 87% of the 450 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/foundry/pay-as-you-go
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://minty-sprout.onrender.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://minty-sprout.onrender.com/v1/tech-stack`
- API key: not needed
- Its API docs: https://minty-sprout.onrender.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing#/paths/~1v1~1tech-stack
- Sold by: Foundry (https://minty-sprout.onrender.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 8%
- Technology: ✓

## Price

- $ per 1,000 companies: $1.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Website tech stack detector: frameworks, CMS, analytics, CDN and server behind a site. Input: a URL.

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Per second: 0.5
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: input
- Method: POST
- Path: /v1/tech-stack

## About the plan

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

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

website, technology name, CDN, generator, powered by, web server

## Foundry's plans (1)

- [Foundry, pay as you go](https://datacircle.dev/company-technology-apis/foundry/pay-as-you-go/llms.txt): $1.00 per 1,000, 8% complete

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

- `POST /v1/tech-stack`: [Foundry, pay as you go](https://datacircle.dev/company-technology-apis/foundry/pay-as-you-go/llms.txt)

## Foundry's APIs (7)

- [Foundry: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: IP company lookup API pricing, 1 plan](https://datacircle.dev/ip-company-lookup-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: GitHub repository API pricing, 1 plan](https://datacircle.dev/github-repository-apis/foundry/pay-as-you-go/llms.txt)
- [Foundry: web scraping API pricing, 1 plan, POST /v1/readability](https://datacircle.dev/web-scraping-apis/foundry/pay-as-you-go-x402-pay-per-call-post-v1-readability/llms.txt)
- [Foundry: web scraping API pricing, 1 plan, POST /v1/html-to-markdown](https://datacircle.dev/web-scraping-apis/foundry/pay-as-you-go-x402-pay-per-call-post-v1-html-to-markdown/llms.txt)
- [Foundry: web scraping API pricing, 1 plan, POST /v1/website-metadata](https://datacircle.dev/web-scraping-apis/foundry/pay-as-you-go-x402-pay-per-call-post-v1-website-metadata/llms.txt)

## Foundry: tech stack API alternatives

- [The Companies API, $5,950 yearly](https://datacircle.dev/company-technology-apis/the-companies-api/5950-yearly/llms.txt): $0.992 per 1,000, 69% complete, stored
- [WhatCMS, $500 monthly, 500,000 Detections, GET /API/Tech](https://datacircle.dev/company-technology-apis/whatcms/500-monthly-500000-detections-get-api-tech/llms.txt): $1.00 per 1,000, 23% complete, stored
- [StartupHub.ai, pay as you go, x402](https://datacircle.dev/company-technology-apis/startuphub-ai/pay-as-you-go-x402/llms.txt): $1.00 per 1,000, 15% complete
- [Outsend, top-up](https://datacircle.dev/company-technology-apis/outsend/top-up/llms.txt): $1.013 per 1,000, 15% 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 2026-11-09.

- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://minty-sprout.onrender.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://minty-sprout.onrender.com/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://minty-sprout.onrender.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://minty-sprout.onrender.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing