Chrome extensions · MCP TOOL
get_extension_historicals
Read an extension’s daily users, rating and rating count.
When to use it
Inspect observed history; inferred points bridge equal readings, and all-null points mean no reading. Without bounds the service uses the last 90 days.
Parameters
Defaults and constraints come from the published Zod input schema. “—” means no schema default or no enum restriction. Use JSON values of the listed type; additional handler rules are described above.
Example prompts
- Show Grammarly’s extension history since September 1, 2026.
Example call
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "get_extension_historicals",
"arguments": {
"extensionId": "chrome:kbfnbcaeplbcioakkpcpgfkobkghlhen",
"from": "2026-09-01T00:00:00Z"
}
}
}Example result
Illustrative, abridged JSON-RPC result. Only selected fields are shown; empty arrays illustrate a response with no rows. These are not current catalog observations. Parse the JSON inside content[].text.
{
"jsonrpc": "2.0",
"id": 1,
"result": {
"content": [
{
"type": "text",
"text": "{\"id\":\"chrome:kbfnbcaeplbcioakkpcpgfkobkghlhen\",\"points\":[]}"
}
]
}
}Free vs paid results
The named extension’s observed daily metrics remain available on Free. This tool does not return app revenue estimates.
Paid access does not fill coverage gaps or unknown values. Returned plan metadata and lock notes explain redaction where applicable. Read the full Free data policy.
Rate limits and usage credit
Days reset at 00:00 UTC. The combined ISO week resets Monday at 00:00 UTC. Every served tool call counts, including cached reads. Failed or refused calls are released along with any charge. Compare plans.
After either allowance, Basic and Pro can opt in to pay $0.02 in usage credit per call to get_extension_historicals. A call exceeding both windows is charged once. Free is refused past its allowances; paid plans without opt-in or enough credit are also refused with HTTP 402 / JSON-RPC -32004.
Credential request throttles and, for live keyword work, store-work throttles also apply. Follow retry instructions in the error reference.