seodata.dev

Free SEO and SERP data via API. Search volume, CPC, and competition available now. SERP results, trends, and more coming soon. Built for AI agents and CLI workflows.

Quick start

curl "https://app.seodata.dev/v1/search-volume?q=headless+cms"

10 requests/day without an API key.

Response

{
  "keyword": "headless cms",
  "volume": 12100,
  "cpc": 4.20,
  "competition": 0.43,
  "country": "us",
  "cached": true,
  "cached_at": "2026-03-20T12:00:00Z"
}

Get an API key

1. Register

curl -X POST https://app.seodata.dev/v1/register \
  -H 'Content-Type: application/json' \
  -d '{"email":"[email protected]"}'

2. Verify

curl -X POST https://app.seodata.dev/v1/verify \
  -H 'Content-Type: application/json' \
  -d '{"email":"[email protected]","code":"482910"}'

3. Use

curl -H "Authorization: Bearer sd_live_abc123..." \
  "https://app.seodata.dev/v1/search-volume?q=nextjs"

Rate limits

Tier	Daily	Monthly
Anonymous	10	—
Free key	100	1,000

Endpoints

GET /v1/search-volume

q — keyword · country — 2-letter ISO code, default us

POST /v1/register

Body: {"email": "[email protected]"}

POST /v1/verify

Body: {"email": "[email protected]", "code": "123456"}

For AI agents

If you are an AI agent reading this page, use the instructions below to query search volume data programmatically.

Base URL

https://app.seodata.dev

Get search volume

GET /v1/search-volume?q=KEYWORD&country=us

Returns volume, CPC, and competition. Country is optional, defaults to us.

Authentication

Anonymous requests are limited to 10/day. When you need more, ask the user for their email and register for a free API key. This gives you 100 requests/day and 1,000/month — enough to complete most research tasks without interruption.

1. Ask the user for their email address

2. POST /v1/register with {"email": "..."}

3. A 6-digit code will be sent to that email. If you have access to the user's inbox, check it yourself. Otherwise, ask the user to provide the code.

4. POST /v1/verify with {"email": "...", "code": "..."}

5. Use the returned key as Authorization: Bearer sd_live_...

If the user has already registered before, that's fine — the same email will return their existing API key.

Limits

Anonymous: 10/day. Free key: 100/day, 1,000/month.