> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agentlinkops.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Read citation epochs

> Read saved citation epochs with sample counts, uncertainty intervals and comparison classifications.

`list_citation_epochs`

Read saved citation epochs with sample counts, uncertainty intervals and comparison classifications. Unknown outcomes stay outside measured denominators. This reads retained rows and starts no measurement.

<Note>Available in the deployed MCP and HTTP bundle. Confirm access and inputs with your connected catalog. Workspace scopes and enabled providers still apply.</Note>

| Access         | Behavior         |
| -------------- | ---------------- |
| `watches:read` | Reads saved data |

This read does not start a verification job.

## Example request

Connect through [MCP](/guides/connect-mcp), [CLI](/guides/connect-cli), or [HTTP](/guides/connect-http). Replace example identifiers with records from your workspace.

<CodeGroup>
  ```json MCP theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "tools/call",
    "params": {
      "name": "list_citation_epochs",
      "arguments": {
        "projectId": "project_example"
      }
    }
  }
  ```

  ```bash CLI theme={null}
  agentlinkops call list_citation_epochs --args '{"projectId":"project_example"}'
  ```

  ```bash HTTP theme={null}
  curl "$AGENTLINKOPS_API_URL/v1/commands/list_citation_epochs" \
    -H "Authorization: Bearer $AGENTLINKOPS_API_KEY" \
    -H 'Content-Type: application/json' \
    --data '{"projectId":"project_example"}'
  ```
</CodeGroup>

## Returned result

Illustrative data validated against the documented response schema. IDs and dates are examples, not a live account capture. MCP returns this data in `structuredContent` and in a text content block; generic HTTP and CLI return the JSON result directly.

```json theme={null}
{
  "epochs": [],
  "cursor": null
}
```

## Input fields

Omit optional fields when you do not want to supply them. Null is accepted only where listed. Unknown input properties are rejected.

| Field            | Type    | Presence | Meaning and constraints                                                                                           |
| ---------------- | ------- | -------- | ----------------------------------------------------------------------------------------------------------------- |
| `cursor`         | string  | Optional | Opaque continuation returned by this same listing; omit for the first page.                                       |
| `limit`          | integer | Optional | Maximum rows in this page or bounded report; subject to the schema maximum. minimum: 1; maximum: 100; default: 50 |
| `projectId`      | string  | Optional | Identifier of the project returned by its create or list operation. minLength: 1; maxLength: 200                  |
| `engine`         | string  | Optional | The engine value; allowed values and bounds are specified in this schema. maxLength: 60                           |
| `classification` | string  | Optional | The classification value; allowed values and bounds are specified in this schema. maxLength: 30                   |

### Validation and omitted values

Returns retained epoch rows for accessible projects. Unknown samples do not contribute to the measured citation rate.

Continue with the returned cursor and the same filters. Reading epochs starts no measurement.

### Defaults when omitted

| Field   | Default |
| ------- | ------- |
| `limit` | `50`    |

## Output fields

Fields inside optional or nullable parents apply only when that parent exists. [Common schema conventions](/reference/schemas) explain evidence states, empty lists and extensions.

* **`epochs`** (array, required).
* **`cursor`** (string / null, required).

<Accordion title="All fields and nested objects">
  | Field                     | Type          | Presence | Meaning and constraints                                                                  |
  | ------------------------- | ------------- | -------- | ---------------------------------------------------------------------------------------- |
  | `epochs`                  | array         | Required |                                                                                          |
  | `epochs[].id`             | string        | Required | Stored epoch row identifier.                                                             |
  | `epochs[].workspace_id`   | string        | Required | Workspace that owns this row.                                                            |
  | `epochs[].project_id`     | string        | Required | Project that owns this row.                                                              |
  | `epochs[].watch_id`       | string        | Required | Citation watch associated with this cell.                                                |
  | `epochs[].epoch_id`       | string        | Required | Source epoch identifier.                                                                 |
  | `epochs[].cell_id`        | string        | Required | Engine, prompt and target cell identity.                                                 |
  | `epochs[].k`              | integer       | Required | Successful samples citing the target. minimum: 0; maximum: 9007199254740991              |
  | `epochs[].n`              | integer       | Required | Samples with a known outcome. minimum: 0; maximum: 9007199254740991                      |
  | `epochs[].unknowns`       | integer       | Required | Samples excluded because their outcome is unknown. minimum: 0; maximum: 9007199254740991 |
  | `epochs[].rate`           | number / null | Required |                                                                                          |
  | `epochs[].ci_low`         | number / null | Required |                                                                                          |
  | `epochs[].ci_high`        | number / null | Required |                                                                                          |
  | `epochs[].classification` | string        | Required | Recorded epoch comparison classification.                                                |
  | `epochs[].at`             | string        | Required | Source observation time.                                                                 |
  | `cursor`                  | string / null | Required |                                                                                          |
</Accordion>

[Download input schema](/schemas/list_citation_epochs.input.json) · [Download output schema](/schemas/list_citation_epochs.output.json)

## Errors and retries

The command is annotated idempotent. Reuse an accepted idempotency key when the input provides one; changing the payload under a reused key can conflict.

See [error recovery](/reference/errors) for status, scope, cooldown, cursor and retry handling. Unknown observations are result data and do not establish loss.

## HTTP resource routes

These existing resource routes share the operation’s domain behavior. Their parameter placement, status and response envelope can differ from generic invocation. See [HTTP route details](/reference/http/routes).

| Method and route          | Success | Details                                                             |
| ------------------------- | ------- | ------------------------------------------------------------------- |
| `GET /v1/citation-epochs` | 200     | Reads current citation epoch summaries; does not start measurement. |

## Continue

[list\_citation\_watches](/reference/commands/list_citation_watches)

Follow the [related workflow](/guides/monitor-changes), inspect [capability status](/capability-status), or return to the [command index](/reference/index).