# PapaCasper, pay as you go: Tech stack API

> Fetch a URL and identity its likely tech stack from response headers (server, x-powered-by, x-generator) and HTML markers (generator meta tag, framework/CMS-specific script or class patterns).

PapaCasper's x402 pay per call plan for the tech stack API costs $10.00 per 1,000 companies. We check each provider's docs for 13 fields. PapaCasper's docs list 1: Technology.
We haven't run PapaCasper through [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt) yet.
We rank 503 plans for tech stack APIs by price. Half the plans cost $5.00 or less per 1,000 companies. This plan costs less per 1,000 companies than 38% of the 503 plans. PapaCasper has no free tech stack API plan. [144 tech stack API plans on our price sheet are free.](https://datacircle.dev/best-tech-stack-api.txt) [YourAITools' free plan](https://datacircle.dev/company-technology-apis/youraitools/free/llms.txt) scores highest of the free plans in our benchmark, at 56.5 out of 100.
[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, and 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 [Botoi](https://datacircle.dev/company-technology-apis/botoi/9-monthly/llms.txt) are the best tech stack API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-technology-apis/papacasper/pay-as-you-go
- [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt)
- Get it: https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Request: `POST https://papacasper.com/mcp/pay/tech_stack_identity`
- API key: not needed
- Its API docs: https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- Sold by: PapaCasper (https://papacasper.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 8%
- Technology: ✓

## Price

- $ per 1,000 companies: $10.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Fetch a URL and identity its likely tech stack from response headers (server, x-powered-by, x-generator) and HTML markers (generator meta tag, framework/CMS-specific script or class patterns).

## Data

- Freshness: live
- Keep data: no limit
- Use data: You may use our sites for lawful purposes. Please do not abuse them: no attempts to break into, overload, or disrupt the sites, the MCP Toolbelt, or the public DNS service, and no use of any of them for illegal activity.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: url
- Method: POST
- Path: /mcp/pay/tech_stack_identity

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone with a wallet paying each call in USDC on Base through x402, with no signup

## The only field the plan's answer can hold

technologies

## PapaCasper's plans (3)

- [PapaCasper, pay as you go](https://datacircle.dev/company-technology-apis/papacasper/pay-as-you-go/llms.txt): $10.00 per 1,000, 8% complete, live
- [PapaCasper, $9 monthly](https://datacircle.dev/company-technology-apis/papacasper/9-monthly/llms.txt): $4.50 per 1,000, 8% complete, live
- [PapaCasper, $29 monthly](https://datacircle.dev/company-technology-apis/papacasper/29-monthly/llms.txt): $2.90 per 1,000, 8% complete, live

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

- `POST /mcp/pay/tech_stack_identity`: [PapaCasper, pay as you go](https://datacircle.dev/company-technology-apis/papacasper/pay-as-you-go/llms.txt)

## PapaCasper's APIs (5)

- [PapaCasper GitHub repository API pricing, 3 plans](https://datacircle.dev/github-repository-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Tech stack API pricing, 3 plans](https://datacircle.dev/company-technology-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Domain WHOIS API pricing, 3 plans](https://datacircle.dev/domain-whois-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/papacasper/pay-as-you-go/llms.txt)
- [PapaCasper Web scraping API pricing, 3 plans](https://datacircle.dev/web-scraping-apis/papacasper/pay-as-you-go/llms.txt)

## PapaCasper: tech stack API alternatives

[PapaCasper alternatives: other tech stack API providers by price](https://datacircle.dev/papacasper-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 companies. Each plan in the list gives live data.

- [ReefAPI, $15 monthly](https://datacircle.dev/company-technology-apis/reefapi/15-monthly/llms.txt): $9.00 per 1,000, 23% complete, live
- [Datakoot, pay as you go, x402 pay per call, POST /api/domain_report](https://datacircle.dev/company-technology-apis/datakoot/pay-as-you-go-x402-pay-per-call-post-api-domain-report/llms.txt): $10.00 per 1,000, 15% complete, live
- [RankParse, $15 monthly](https://datacircle.dev/company-technology-apis/rankparse/15-monthly/llms.txt): $10.00 per 1,000, 23% complete, live
- [Agent Data Tools, pay as you go](https://datacircle.dev/company-technology-apis/agent-data-tools/pay-as-you-go/llms.txt): $10.00 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 2026-11-10.

- https://papacasper.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://papacasper.com/mcp-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://papacasper.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing
- https://papacasper.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing