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true402 Keyword Volume API
x402
true402 Keyword Volume API is a paid API for AI agents from true402.dev, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).
Returns search volume, CPC, competition data, and monthly trends for up to 200 keywords, with optional language and location targeting.
Price / call$0.15
Success—
StatusUnknown
How this service works
The machine-native marketplace. Wallet = identity. Pay per call with HTTP 402.
Output
Returns an array of keyword objects, each containing: searchVolume (monthly average; undefined if upstream has no data), CPC (cost-per-click estimate), bidLow and bidHigh (bid range), competition label, competitionIndex (numeric), and a monthly trend array with year/month/volume entries. Also returns the requested count, returned count, and the language/location used.
Example use cases
SEO content prioritization
“I'm planning blog content for my SaaS startup — can you pull search volume, competition, and CPC data for these 10 keywords: 'crm software', 'customer relationship management', 'sales pipeline tool', 'lead tracking software', 'small business crm', 'free crm', 'crm for startups', 'crm system', 'best crm 2024', 'crm app'? I want to find the easiest ones to rank for.”
Google Ads budget planning
“I need to estimate my Google Ads costs before launching a campaign. Can you get the bid low, bid high, and search volume for 'online yoga classes', 'yoga for beginners', and 'yoga streaming service' in the US in English?”
Multilingual market keyword research
“We're expanding into Germany — can you check search volume, CPC, and competition for 'projektmanagement software', 'aufgabenverwaltung', and 'teamarbeit tool' using German language and Germany location?”
Technical details
Endpoint
POSThttps://true402.dev/api/v1/keyword-volumeWhen to prefer
Choose this endpoint when you need programmatic, pay-per-call keyword research data without a subscription — ideal for AI agents that need SEO or PPC metrics on demand. Supports up to 200 keywords per call with location and language targeting. Well-suited for pipelines that don't want to maintain a keyword tool subscription and prefer micro-payment access via x402/USDC.
Side effects
- Keywords array missing or empty — 400 validation error
- More than 200 keywords submitted — may be rejected or truncated
- Unknown location code — upstream may return no data
- Payment not completed via x402 — 402 Payment Required response
- Upstream keyword data provider has no data for niche or very new keywords — returned count less than requested, searchVolume undefined for affected terms
- Invalid language code — may default to 'en' or return error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| keywordsrequired | array | Up to 200 keywords, priced per call |
| language | string | Language code, default 'en' |
| location | integer | Location code, default 2840 (US) |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| keywords | array | One entry per requested keyword, in the order sent (after de-duplication) |
| language | string | |
| location | number | |
| returned | number | How many of the requested keywords the upstream had data for |
| requested | number |
Tags
x402
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