# Agent Extraction API, free: Tech stack API > Website tech stack detection: CMS, e-commerce, frameworks, analytics, marketing, support chat, payments, consent, CDN/hosting and email provider used by a company website, each with evidence (HTML, header or DNS). ~70 signatures. Agent Extraction API's Free call plan for the tech stack API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. Agent Extraction API's docs list 1: Technology. You get $1 of credit. You spend the credit on Agent Extraction API's other calls. This call is free for up to 1 call in all. In [our tech stack API benchmark](https://datacircle.dev/best-tech-stack-api.txt), the best plan from Agent Extraction API scores 36.1 out of 100. Agent Extraction API ranks 29th of 44 providers. This plan is free. We rank 450 plans for tech stack APIs by price. Half the plans cost $7.155 or less per 1,000 companies. [See the best free tech stack API plan.](https://datacircle.dev/best-tech-stack-api.txt) [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/agent-extraction-api/free - [Company technologies API: tech stack APIs compared](https://datacircle.dev/best-tech-stack-api.txt) - Get it: https://freetier-agent-api.pages.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing - Request: `GET https://freetier-agent-api.pages.dev/api/company-techstack` - API key: not needed - Its API docs: https://freetier-agent-api.pages.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing#/paths/~1api~1company-techstack - Sold by: Agent Extraction API (https://freetier-agent-api.pages.dev?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: $0.00 - Per: call - Billing: free ## Aggregators - Aggregators: none ## Charges - Also pays for: nothing else ## Not found - $ per 1,000: $0.00 ## In their words - Their pitch: Website tech stack detection: CMS, e-commerce, frameworks, analytics, marketing, support chat, payments, consent, CDN/hosting and email provider used by a company website, each with evidence (HTML, header or DNS). ~70 signatures. ## Data - Keep data: no limit - Use data: Data is provided as is, for information. Each response names its sources and their licenses. ## Plan - Pay: $0 - You get: $1 - Enough for: 1 call, once - Expires: never ## Rate limit - Batch: 1 ## Speed - Answer: in the call - Median: 0.46 s ## The call - You send: domain - Method: GET - Path: /api/company-techstack ## About the plan - Plan: Free call - Who can get it: anyone, no wallet or account ## The 4 fields the plan's answer can hold domain, technology count, technologies by category, evidence ## Agent Extraction API's plans (5) - [Agent Extraction API, free](https://datacircle.dev/company-technology-apis/agent-extraction-api/free/llms.txt): $0.00 per 1,000, 8% complete - [Agent Extraction API, pay as you go](https://datacircle.dev/company-technology-apis/agent-extraction-api/pay-as-you-go/llms.txt): $5.00 per 1,000, 8% complete - [Agent Extraction API, $3 pack](https://datacircle.dev/company-technology-apis/agent-extraction-api/3-pack/llms.txt): $15.00 per 1,000, 8% complete - [Agent Extraction API, $12 pack](https://datacircle.dev/company-technology-apis/agent-extraction-api/12-pack/llms.txt): $12.00 per 1,000, 8% complete - [Agent Extraction API, $40 pack](https://datacircle.dev/company-technology-apis/agent-extraction-api/40-pack/llms.txt): $10.00 per 1,000, 8% complete ## Agent Extraction API's calls for this API (1) - `GET /api/company-techstack`: [Agent Extraction API, free](https://datacircle.dev/company-technology-apis/agent-extraction-api/free/llms.txt) ## Agent Extraction API's APIs (6) - [Agent Extraction API: tech stack API pricing, 5 plans](https://datacircle.dev/company-technology-apis/agent-extraction-api/free/llms.txt) - [Agent Extraction API: domain WHOIS API pricing, 5 plans](https://datacircle.dev/domain-whois-apis/agent-extraction-api/free/llms.txt) - [Agent Extraction API: news API pricing, 5 plans](https://datacircle.dev/news-apis/agent-extraction-api/free/llms.txt) - [Agent Extraction API: company enrichment API pricing, 5 plans, GET /api/company-batch](https://datacircle.dev/company-enrichment-apis/agent-extraction-api/free-call-get-api-company-batch/llms.txt) - [Agent Extraction API: company enrichment API pricing, 5 plans, GET /api/company-profile](https://datacircle.dev/company-enrichment-apis/agent-extraction-api/free-call-get-api-company-profile/llms.txt) - [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify-quick](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify-quick/llms.txt) - [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify-batch](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify-batch/llms.txt) - [Agent Extraction API: email verification API pricing, 5 plans, GET /api/email-verify](https://datacircle.dev/validate-email-apis/agent-extraction-api/free-call-get-api-email-verify/llms.txt) - [Agent Extraction API: web scraping API pricing, 5 plans, GET /api/page-rag](https://datacircle.dev/web-scraping-apis/agent-extraction-api/free-call-get-api-page-rag/llms.txt) - [Agent Extraction API: web scraping API pricing, 5 plans, GET /api/page-markdown](https://datacircle.dev/web-scraping-apis/agent-extraction-api/free-call-get-api-page-markdown/llms.txt) ## Agent Extraction API: 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 - [Ambolt, pay as you go](https://datacircle.dev/company-technology-apis/ambolt/pay-as-you-go/llms.txt): $5.00 per 1,000, 8% complete, live - [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 - [Agent402 Tools, pay as you go](https://datacircle.dev/company-technology-apis/agent402-tools/pay-as-you-go/llms.txt): $5.00 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 2026-11-09. - https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing - https://freetier-agent-api.pages.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing - https://freetier-agent-api.pages.dev/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing - https://freetier-agent-api.pages.dev/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing - https://freetier-agent-api.pages.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=tech-stack-api-pricing