# TechnologyChecker, free, Free, GET /v1/domain/{domain}/changes: Company technology API

> What a single domain recently added and dropped, with confidence scoring and the same accuracy guards as the Signals API.

TechnologyChecker's company technology API on its Free plan, $0.00 per 1,000 companies. 2 of the 13 key fields: Technology, Categories.

- This page: https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-domain-domain-changes
- Get it: https://technologychecker.io/pricing
- Its API docs: https://technologychecker.io/docs/api-reference/domain-technologies/get-domain-changes-api
- Sold by: TechnologyChecker (https://technologychecker.io)
- Checked: 2026-10-20

## In the answer

- Completeness: 15%
- Technology: ✓
- Categories: ✓

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Per: call
- Also pays for: Signal types index · Alerts: create, read, edit, test, delivery log · Audience create-from-upload, read, rename, delete, members · Lead list search, tech map, count preview, list, preview, export, delete · Usage, credits and key management · from the same budget: Domain lookup · Domain history · Find domains by technology · Technology lookup / search · Technology stats and trends · Market share · Get companies by technology · Company lookup · Company search · Batch company lookup (1 per domain) · Adoption, churn, switch and whitespace signals · Audience technology report · Audience breakdown · Segment technology stats · Build a computed audience · Live technology lookup · AI extractor · Lead list creation (1 per delivered row) · Signal CSV export (1 per exported row) · Churn validation · Audience refresh crawl · Alert crawl cadence

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: What a single domain recently added and dropped, with confidence scoring and the same accuracy guards as the Signals API.

## Data

- Freshness: stored
- Keep data: Cached data must be refreshed at intervals consistent with your subscription plan
- Use data: You may integrate API data into your internal business applications, CRM systems, and workflows [...] You may not redistribute raw API data to third parties or make it publicly accessible without our written consent [...] You may not use API data to create a competing technology detection service or database [...] You must comply with all applicable data protection laws when processing personal data obtained through the API [...] The following activities are strictly prohibited: [...] Reselling, redistributing, sublicensing, or otherwise making the Service or its data available to third parties without our prior written consent [...] Using the Service or its data to build a competing product, service, or database [...] Using the Service to send unsolicited commercial communications (spam), including bulk emails, cold calls, or messages to contacts obtained through the Service without a legitimate legal basis

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 100 calls a month
- Expires: at the monthly reset, credits don't roll over

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain (in the path). Optional: window, include_first_seen
- Method: GET
- Path: /v1/domain/{domain}/changes

## About the plan

- Plan: Free
- Who can get it: anyone 18 or over, for individual evaluation: the free plan may not be used for commercial-scale operations

## The 16 fields the plan's answer can hold

domain, technologies, technology ID, technology category, subdomains, technology change type, technology change date, technology detection URL, technology detection count, technology detection rate, churn reliability, change confidence score, change confidence label, change confidence guard, added technologies count, dropped technologies count

## TechnologyChecker's plans (6)

- [TechnologyChecker, free, Free, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-domain-domain-changes/llms.txt): $0.00 per 1,000, 15% complete, stored
- [TechnologyChecker, $89 monthly, Pro, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/89-monthly-pro-get-v1-domain-domain-changes/llms.txt): $8.90 per 1,000, 15% complete, stored
- [TechnologyChecker, $249 monthly, Scale, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/249-monthly-scale-get-v1-domain-domain-changes/llms.txt): $4.98 per 1,000, 15% complete, stored
- [TechnologyChecker, $890 yearly, Pro, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/890-yearly-pro-get-v1-domain-domain-changes/llms.txt): $7.417 per 1,000, 15% complete, stored
- [TechnologyChecker, $2,490 yearly, Scale, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/2490-yearly-scale-get-v1-domain-domain-changes/llms.txt): $4.15 per 1,000, 15% complete, stored
- [TechnologyChecker, contact us, Enterprise, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/contact-us-enterprise-get-v1-domain-domain-changes/llms.txt): 15% complete, stored

## TechnologyChecker's calls (5)

- `GET /v1/domain/{domain}/changes`: [TechnologyChecker, free, Free, GET /v1/domain/{domain}/changes](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-domain-domain-changes/llms.txt)
- `GET /v1/domain/{domain}/history`: [TechnologyChecker, free, Free, GET /v1/domain/{domain}/history](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-domain-domain-history/llms.txt)
- `GET /v1/domain/{domain}`: [TechnologyChecker, free, Free, GET /v1/domain/{domain}](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-domain-domain/llms.txt)
- `POST /v1/technology-lookup-live`: [TechnologyChecker, free, Free, POST /v1/technology-lookup-live](https://datacircle.dev/company-technology-apis/technologychecker/free-free-post-v1-technology-lookup-live/llms.txt)
- `GET /v1/technology-lookup-live`: [TechnologyChecker, free, Free, GET /v1/technology-lookup-live](https://datacircle.dev/company-technology-apis/technologychecker/free-free-get-v1-technology-lookup-live/llms.txt)

## Similar plans of other providers

- [DataForSEO, free](https://datacircle.dev/company-technology-apis/dataforseo/free/llms.txt): $0.00 per 1,000, 54% complete, stored
- [ZoomInfo, free](https://datacircle.dev/company-technology-apis/zoominfo/free/llms.txt): $0.00 per 1,000, 15% complete, stored
- [BuiltWith, $9,950 yearly](https://datacircle.dev/company-technology-apis/builtwith/9950-yearly/llms.txt): $8.292 per 1,000, 85% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

- https://technologychecker.io/docs/api-reference/credits
- https://technologychecker.io/docs/api-reference/domain-technologies/get-domain-changes-api
- https://technologychecker.io/docs/api-reference/openapi.json
- https://technologychecker.io/docs/api-reference/rate-limits
- https://technologychecker.io/docs/features/our-data
- https://technologychecker.io/pricing
- https://technologychecker.io/terms-of-use