# citable.run Keyword Metrics

> citable.run Keyword Metrics is a paid API for AI agents from citable.run, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-10).

Returns search volume, CPC, competition score, keyword difficulty, and search intent for up to 20 keywords in a single call.

## Facts

- Endpoint: GET https://citable.run/v1/keyword-metrics?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citable-run-keyword-metrics-a2ad3a6e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DAIivdeVdzylo_Ko-Kyv8

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability citable-run-keyword-metrics-a2ad3a6e
```

Example prompt: Can you pull keyword metrics for 'content marketing', 'SEO tools', and 'backlink checker' — I need search volume, CPC, difficulty, and search intent for each, in English for the US market?

## When to prefer this

Use this endpoint when you need fast, multi-keyword SEO and PPC metrics in a single API call — especially when you need all five signals (volume, CPC, competition, difficulty, intent) together. Ideal for keyword research workflows, content planning, and ad bid estimation. Prefer this over single-keyword lookups when you have a batch of up to 20 terms to evaluate at once.

## Known failure modes

- More than 20 keywords submitted — returns validation error
- Keyword exceeds 80 characters — rejected
- Invalid 2-letter language or country code — returns error
- No keywords provided — missing required parameter error
- Rate limiting or payment failure due to insufficient USDC balance

## How this service works

Search volume, CPC, competition, difficulty and intent for up to 20 keywords per call.

## Output

Returns a structured response for each submitted keyword containing: monthly search volume, cost-per-click (CPC) estimate, competition level, keyword difficulty score, and inferred search intent (e.g. informational, commercial, transactional, navigational).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "keywords"
     ],
     "properties": {
      "lang": {
       "type": "string",
       "description": "2-letter language code, default en"
      },
      "country": {
       "type": "string",
       "description": "2-letter country code, default us"
      },
      "keywords": {
       "type": "string",
       "description": "comma list of 1–20 keywords (each ≤80 chars)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/citable-run-keyword-metrics-a2ad3a6e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from citable.run](https://www.zero.xyz/host/citable.run/llms.txt)