# SERPSpur, free, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster: Keyword research API

> Build custom SEO dashboards, Google Sheets scripts, and AI agents using your unified credit wallet.

SERPSpur's Free plan for the keyword research API costs $0.00 per 1,000 keywords. We check each provider's docs for 6 fields. SERPSpur's docs list 5: Search volume, Monthly trend, Cost per click, Keyword difficulty, Search intent.
We haven't run SERPSpur through [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt) yet.
This plan is free. We rank 378 plans for keyword research APIs by price. Half the plans cost $3.00 or less per 1,000 keywords. [89 keyword research API plans on our price sheet are free.](https://datacircle.dev/best-keyword-research-api.txt) [Bing Webmaster Tools' free plan](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt) scores highest of the free plans in our benchmark, at 51.3 out of 100.
[AppDrift's $14.99 monthly plan](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) costs the least per 1,000 keywords. AppDrift's keyword research API costs nothing beyond the plan price. [Pixel Tools' ₽99 pack](https://datacircle.dev/keyword-research-apis/pixel-tools/99-pack-guru-for-99-rubles-post-api-wordstatapi-wordstatapi/llms.txt) costs the least for 10,000 keywords a month: about $1.18.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/keyword-research-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords, and costs less up front than AppDrift's $14.99 monthly plan.
[DataForSEO](https://datacircle.dev/keyword-research-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-overview-live/llms.txt), [Bishopi](https://datacircle.dev/keyword-research-apis/bishopi/149-monthly-start-up-get-historical-search-vol/llms.txt) and [AppDrift](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) are the best keyword research API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-4-enterprise-mega-cluster
- [Keyword research API: the best SEO keyword data providers](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://serpspur.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `GET https://serpspur.com/api/v1/keywords`, Depth 4: Enterprise Mega Cluster
- API key: with the plan, on https://serpspur.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://serpspur.com/credit-cost-schedule/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Sold by: SERPSpur (https://serpspur.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-12

## In the answer

- Completeness: 83%
- Search volume: ✓
- Monthly trend: ✓
- Cost per click: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- $ per 1,000 keywords: $0.00
- Per: call
- Billing: free

## Charges

- Also pays for: from the same budget: Depth 0: Seed Keyword Intelligence · Lite Keyword Scan · Depth 2: Standard Cluster · Full 100-Keyword Cluster · 30-Day Vault Cache Lookup · Batch Keyword Endpoint · Community Golden Gems Feed API · TAI™ API (90-Day Vault Lookup) · TAI™ API (Live Deep Behavioral Scan) · TAI™ Batch Vault Endpoint

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Build custom SEO dashboards, Google Sheets scripts, and AI agents using your unified credit wallet.

## Data

- Keep data: no limit
- Use data: You are granted a limited, non-exclusive, non-transferable license to use the Services for personal or business use in accordance with these Terms. You may not reproduce, distribute, or create derivative works from our content without our express permission. [...] You agree not to: Use our tools for unlawful, abusive, or fraudulent purposes, Attempt to gain unauthorized access to other users' data or SERPspur's backend, Disrupt or interfere with the security, integrity, or performance of our Services, Reverse engineer, copy, resell, or exploit any part of our Services without permission

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: about 2 calls a month
- Expires: never

## Rate limit

- Per second: 0.5 (30 a minute)
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword, depth "4". Optional: country, language
- Method: GET
- Path: /api/v1/keywords

## About the plan

- Plan: Free
- Who can get it: anyone at least 18 years old

## The 29 fields the plan's answer can hold

keyword, country, language, search volume, search volume trend, search volume growth, quarter-over-quarter momentum, peak month, keyword difficulty, opportunity score, main intent, cost per click, average referring domains, average backlinks, average dofollow links, average domain rank, SERP features, forum weakness, related keywords count, related keyword, related keyword search volume, related keyword search volume growth, related keyword keyword difficulty, related keyword cost per click, related keyword main intent, related keyword referring domains, related keyword dofollow links, related keyword golden gem, related keyword search volume trend

## SERPSpur's plans (8)

- [SERPSpur, free, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $0.00 per 1,000, 83% complete
- [SERPSpur, $10 pack, Custom Package, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/10-pack-custom-package-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $140.00 per 1,000, 83% complete
- [SERPSpur, $40 pack, Freelancer Credits, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/40-pack-freelancer-credits-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $93.333 per 1,000, 83% complete
- [SERPSpur, $120 pack, Agency Credits, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/120-pack-agency-credits-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $60.00 per 1,000, 83% complete
- [SERPSpur, $49 monthly, Pro, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/49-monthly-pro-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $171.50 per 1,000, 83% complete
- [SERPSpur, $165 monthly, Agency, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/165-monthly-agency-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $165.00 per 1,000, 83% complete
- [SERPSpur, $555 yearly, Pro Yearly, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/555-yearly-pro-yearly-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $161.875 per 1,000, 83% complete
- [SERPSpur, $1,683 yearly, Agency Yearly, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/1683-yearly-agency-yearly-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $140.25 per 1,000, 83% complete

## SERPSpur's calls (6)

- `POST /api/v1/keywords/batch`: [SERPSpur, free, POST /api/v1/keywords/batch](https://datacircle.dev/keyword-research-apis/serpspur/free-post-api-v1-keywords-batch/llms.txt)
- `GET /api/v1/keywords`, Depth 0: Seed Keyword Intelligence: [SERPSpur, free, GET /api/v1/keywords, Depth 0: Seed Keyword Intelligence](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-0-seed-keyword-intelligence/llms.txt)
- `GET /api/v1/keywords`, Depth 2: Standard Cluster: [SERPSpur, free, GET /api/v1/keywords, Depth 2: Standard Cluster](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-2-standard-cluster/llms.txt)
- `GET /api/v1/keywords`, Depth 4: Enterprise Mega Cluster: [SERPSpur, free, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt)
- `GET /api/v1/keywords`, Full 100-Keyword Cluster: [SERPSpur, free, GET /api/v1/keywords, Full 100-Keyword Cluster](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-full-100-keyword-cluster/llms.txt)
- `GET /api/v1/keywords`, Lite Keyword Scan: [SERPSpur, free, GET /api/v1/keywords, Lite Keyword Scan](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-lite-keyword-scan/llms.txt)

## SERPSpur's APIs (1)

- [SERPSpur Keyword research API pricing, 8 plans, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/free-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt)

## SERPSpur: keyword research API alternatives

[SERPSpur alternatives: other keyword research API providers by price](https://datacircle.dev/serpspur-alternatives.txt)

We list SERPSpur's cheapest paid plan first. Next we list other providers' plans closest to SERPSpur in price per 1,000 keywords.

- [SERPSpur, $120 pack, Agency Credits, GET /api/v1/keywords, Depth 4: Enterprise Mega Cluster](https://datacircle.dev/keyword-research-apis/serpspur/120-pack-agency-credits-get-api-v1-keywords-depth-4-enterprise-mega-cluster/llms.txt): $60.00 per 1,000, 83% complete
- [Ahrefs, $129 monthly, Lite, GET /v3/keywords-explorer/overview, Overview, full](https://datacircle.dev/keyword-research-apis/ahrefs/129-monthly-lite-get-v3-keywords-explorer-overview-overview-full/llms.txt): $53.535 per 1,000, 50% complete
- [Bishopi, $1,428 yearly, Start-Up, GET /historical_search_vol/](https://datacircle.dev/keyword-research-apis/bishopi/1428-yearly-start-up-get-historical-search-vol/llms.txt): $59.50 per 1,000, 67% complete, stored
- [Ranxplorer, €54 pack, Sans abonnement 100 k, POST /v1/bulk/keywords](https://datacircle.dev/keyword-research-apis/ranxplorer/54-pack-sans-abonnement-100-k-post-v1-bulk-keywords/llms.txt): $60.766 per 1,000, 50% complete
- [Answer Socrates, $390 yearly](https://datacircle.dev/keyword-research-apis/answer-socrates/390-yearly/llms.txt): $65.00 per 1,000, 0% 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 2026-11-12.

- https://serpspur.com/api-docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://serpspur.com/credit-cost-schedule?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://serpspur.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://serpspur.com/term-of-service/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing