---
title: "read: coverage by cell"
description: "a source, or a scope with a window to measured, never measured with the reason, withheld"
section: reference
address: /reference/read/coverage_by_cell
contract: 0476e35e6e275db5
---

# read: coverage by cell

a source, or a scope with a window to measured, never measured with the reason, withheld

[figure: The caller sends CoverageByCellInput to /v1/read/coverage_by_cell. The platform returns a card whose body is Coverage.]

<span class="op-method">POST</span><span class="op-path">/v1/read/coverage_by_cell</span>

Read coverage by cell. The call needs the brand rung under a token with the read grant, and it is served by either, by the size bound.

The route takes [CoverageByCellInput](/concepts/coveragebycellinput) and returns a card whose body is [Coverage](/concepts/coverage).



## Request body
The request body is [CoverageByCellInput](/concepts/coveragebycellinput).



| field | type | required | note |
|---|---|---|---|
| `source` | `id` | no |  |
| `scope` | [Predicate](/concepts/predicate) | no |  |
| `window` | [Window](/concepts/window) | no |  |



## Response
The route returns a card whose body is [Coverage](/concepts/coverage). Every card ends with a foot that states the basis of each number, the scope of the call, and the time when the facts were true.

## Headers


| header | required | meaning |
|---|---|---|
| `Scale-Scope` | yes | the scope the call runs in: tenant/<id>, then /brand/<id>, then /strategy/<id> |
| `Scale-As-True-On` | no | the date the facts must have been true on; defaults to now |
| `Scale-As-Known-On` | no | the date the facts must have been known on; defaults to now |
| `Scale-Key` | no | for a change, the key made from the input; a repeat under the same key returns the unit held and writes nothing |



A caller needs the brand rung and a token with the read grant. The platform or the desktop app serves this route.

## Example
The example sends the smallest body that CoverageByCellInput allows. The build validates it against the schema of CoverageByCellInput.

<details class="wire"><summary>Example</summary>





```sh
curl -X POST https://api.scaleintelligence.co/v1/read/coverage_by_cell \
  -H "Scale-Key: $SCALE_KEY" -H "Scale-Scope: tenant/<id>" \
  -H "content-type: application/json" \
  -d '{}'
```




```typescript
import { client } from "@scale/sdk";
const answer = await client.read.coverage_by_cell({});
// answer.body is a Coverage. answer.foot holds the basis, the scope and the time.
```




```python
import requests
answer = requests.post("https://api.scaleintelligence.co/v1/read/coverage_by_cell",
    headers={"Scale-Key": KEY, "Scale-Scope": "tenant/<id>"},
    json={}).json()
```




```rust
let answer: Card = client.post("https://api.scaleintelligence.co/v1/read/coverage_by_cell")
    .header("Scale-Key", key).header("Scale-Scope", "tenant/<id>")
    .json(&CoverageByCellInput { /* the fields of the page */ }).send().await?.json().await?;
```




</details>

## MCP tool
The MCP tool `si.read.coverage_by_cell` takes the same input and returns the same card. The tool only reads data. An MCP host that renders cards draws this card from `ui://scale-intelligence/cards/Coverage`. The [tool's page](/reference/tools/si-read-coverage_by_cell) describes it.