# SignalSumo, $99 monthly: Keyword research API

> Returns a full metric set for a seed keyword — search volume, CPC, competition, difficulty, search intent, a 12-month volume trend, SERP features and more — plus a ranked list of related keywords carrying the same fields.

SignalSumo's "Pro — monthly" plan for the keyword research API costs $4,950.00 per 1,000 keywords. We check each provider's docs for 6 fields. SignalSumo's docs list all 6: Search volume, Monthly trend, Cost per click, Competition, Keyword difficulty, Search intent.
We haven't run SignalSumo through [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt) yet.
We rank 378 plans for keyword research APIs by price. Half the plans cost $3.00 or less per 1,000 keywords. 3 of the 378 plans cost more per 1,000 keywords than this plan.
[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/signalsumo/99-monthly
- [Keyword research API: the best SEO keyword data providers](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `POST https://signalsumo.com/api/v1/keyword-research`
- API key: with the plan, on https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://signalsumo.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Sold by: SignalSumo (https://signalsumo.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-12

## In the answer

- Completeness: 100%
- Search volume: ✓
- Monthly trend: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- $ per 1,000 keywords: $4,950.00
- Per: call
- Billing: monthly
- $ a month: $99

## Charges

- Also pays for: from the same budget: GET Usage · GET Backlinks · POST Site Audit · GET Jobs · GET Tracked Keywords · GET Rank History · GET GSC Properties · GET GSC Queries · GET AI Projects · GET Share of Voice · GET Locations

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $4,950.00

## In their words

- Their pitch: Returns a full metric set for a seed keyword — search volume, CPC, competition, difficulty, search intent, a 12-month volume trend, SERP features and more — plus a ranked list of related keywords carrying the same fields.

## Data

- Keep data: no limit
- Use data: The reports, analysis outputs, and data exports generated by the Platform for your account are yours to use for your own business purposes. You may not resell or redistribute Platform outputs as a standalone data product without our express written consent. [...] You must not: [...] Share account credentials with third parties or resell access to the Platform without authorisation. [...] Use any output from the Platform to engage in spam, phishing, or other deceptive practices.

## Plan

- Pay: $99
- You get: 20 requests a month
- Enough for: 20 calls a month
- Expires: 1st of each month

## Rate limit

- Per second: 0.33 (20 a minute)
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword, Content-Type header "application/json". Optional: location_code, language_code, limit
- Method: POST
- Path: /keyword-research

## About the plan

- Plan: Pro — monthly
- Who can get it: anyone at least 18 years old and able to form a binding contract

## The 37 fields the plan's answer can hold

keyword, location code, language code, total results, search volume, cost per click, competition, competition level, keyword difficulty, intents, search volume trend, search volume growth, SERP features, low top of page bid, high top of page bid, average backlinks, average referring domains, competing domain rank, search results count, related keyword, related keyword search volume, related keyword cost per click, related keyword competition, related keyword competition level, related keyword keyword difficulty, related keyword intents, related keyword search volume trend, related keyword search volume growth, related keyword SERP features, related keyword low top of page bid, related keyword high top of page bid, related keyword average backlinks, related keyword average referring domains, related keyword competing domain rank, related keyword search results count, related sub-keywords, match bucket

## SignalSumo's plans (4)

- [SignalSumo, $99 monthly](https://datacircle.dev/keyword-research-apis/signalsumo/99-monthly/llms.txt): $4,950.00 per 1,000, 100% complete
- [SignalSumo, $249 monthly](https://datacircle.dev/keyword-research-apis/signalsumo/249-monthly/llms.txt): $2,490.00 per 1,000, 100% complete
- [SignalSumo, $990 yearly](https://datacircle.dev/keyword-research-apis/signalsumo/990-yearly/llms.txt): $4,125.00 per 1,000, 100% complete
- [SignalSumo, $2,499 yearly](https://datacircle.dev/keyword-research-apis/signalsumo/2499-yearly/llms.txt): $2,082.50 per 1,000, 100% complete

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

- `POST /keyword-research`: [SignalSumo, $99 monthly](https://datacircle.dev/keyword-research-apis/signalsumo/99-monthly/llms.txt)

## SignalSumo's APIs (4)

- [SignalSumo Backlink API pricing, 4 plans](https://datacircle.dev/backlink-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Domain authority API pricing, 4 plans](https://datacircle.dev/domain-authority-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Keyword research API pricing, 4 plans](https://datacircle.dev/keyword-research-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Related keywords API pricing, 4 plans](https://datacircle.dev/related-keywords-apis/signalsumo/99-monthly/llms.txt)

## SignalSumo: keyword research API alternatives

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

We list other providers' plans closest to this plan in price per 1,000 keywords.

- [Senuto, €1,188 yearly](https://datacircle.dev/keyword-research-apis/senuto/1188-yearly/llms.txt): $2,228.094 per 1,000, 50% complete
- [xSeek, $149 monthly](https://datacircle.dev/keyword-research-apis/xseek/149-monthly/llms.txt): $4,966.667 per 1,000, 67% complete
- [Answer Socrates, $190 yearly](https://datacircle.dev/keyword-research-apis/answer-socrates/190-yearly/llms.txt): $5,277.778 per 1,000, 0% complete, live
- [Jungle Scout, $588 yearly](https://datacircle.dev/keyword-research-apis/jungle-scout/588-yearly/llms.txt): $5,880.00 per 1,000, 0% complete

## 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://signalsumo.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://signalsumo.com/page/terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing