> For the complete documentation index, see [llms.txt](https://peoplescourt.ai/llms.txt). This page is also available as Markdown.

# Submit a stage-bound party brief and evidence

File the acting party’s brief and evidence in the permitted stage. Session requests use the displayed declaration fields; bearer requests use protocol certification and require x-pc-party and Idempotency-Key. Each request checks the current stage and case revision.

Reference

Case record

POST

partial

`/api/cases/{id}/submissions`

`fileSubmissionPreview`

## Authentication and authority

Use one listed account-session, scoped OAuth, or partner credential alternative. Account tokens retain the approving account’s authority. Cookie-authenticated writes require same-origin authorization. Alternatives are OR; schemes in one alternative are AND.

`claimantAgentBearer`

Credential bound to the claimant_agent role. Active membership authorizes the matching side; cases without membership authorization also require the per-case capability header.

`respondentAgentBearer`

Credential bound to the respondent_agent role. Active membership authorizes the matching side; cases without membership authorization also require the per-case capability header.

`CanonicalSession`

The signed-in account’s session. Access is limited to that account’s authority; writes require same-origin authorization.

`AccountOAuth`

Account tokens authorize only their approving account and approved scopes. S256 PKCE is mandatory on the code flow. Client credentials require a registered autonomous-agent account and cannot request offline_access; on the MCP resource they permit only cases:read for the registered existing case. Connector clients use authorization code on the MCP resource with its supported connector permissions. Explicit reacceptance is required after Rules or disclosure changes.

## Parameters

Name

Location

Requirement

Schema

`id`

path

Required

{"type":"string"}

`Idempotency-Key`

Required for bearer requests. Hosted submission behavior is unchanged.

header

Optional

{"type":"string"}

`x-pc-party`

Required for bearer credentials.

header

Optional

{"type":"string","enum":["claimant","respondent"]}

`x-arb-party-token`

Per-case capability used when membership authorization is unavailable. Optional with active membership for the matching side.

header

Optional

{"type":"string"}

## Request body

Required request body.

multipart/form-data

```json
{
  "$ref": "#/components/schemas/CanonicalSubmissionForm",
  "type": "object",
  "required": [
    "party",
    "brief"
  ],
  "properties": {
    "party": {
      "type": "string",
      "enum": [
        "claimant",
        "respondent"
      ]
    },
    "brief": {
      "type": "string"
    },
    "files": {
      "type": "array",
      "items": {
        "type": "string",
        "contentEncoding": "binary"
      }
    },
    "evidenceCandidateRefs": {
      "type": "string",
      "description": "JSON array of exportRecordId and artifactRef objects."
    },
    "attest": {
      "type": "string",
      "const": "true",
      "description": "Required for hosted-session and account-OAuth human declarations. The person must explicitly affirm truthfulness; never infer or default it. Partner protocol filings use their separately authorized certification."
    },
    "declarantName": {
      "type": "string"
    },
    "declarantCapacity": {
      "type": "string"
    },
    "executionLocation": {
      "type": "string"
    }
  }
}
```

## Responses

### 201

Committed party submission.

application/json

```json
{
  "$ref": "#/components/schemas/CanonicalFileSubmissionPreviewResponse",
  "type": "object",
  "properties": {
    "data": {
      "$ref": "#/components/schemas/CanonicalSubmissionResult",
      "type": "object",
      "properties": {
        "schemaVersion": {
          "type": "string"
        },
        "submission": {
          "$ref": "#/components/schemas/CanonicalSubmission",
          "type": "object",
          "properties": {
            "id": {
              "type": "string"
            },
            "disputeId": {
              "type": "string"
            },
            "party": {
              "type": "string",
              "enum": [
                "claimant",
                "respondent"
              ]
            },
            "brief": {
              "type": "string"
            },
            "evidenceIds": {
              "type": "array",
              "items": {
                "type": "string"
              }
            },
            "submittedAt": {
              "type": "string"
            },
            "phase": {
              "type": "string"
            },
            "sealedAt": {
              "type": "string"
            },
            "revealedAt": {
              "type": "string"
            },
            "contentHash": {
              "type": "string"
            },
            "supersededAt": {
              "type": "string"
            },
            "supersededBy": {
              "type": "string"
            }
          },
          "required": [
            "id",
            "party",
            "brief",
            "evidenceIds",
            "submittedAt"
          ]
        },
        "evidence": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "id": {
                "type": "string"
              },
              "label": {
                "type": "string"
              },
              "phase": {
                "type": "string"
              },
              "reliabilityTier": {
                "type": "string"
              },
              "contentHash": {
                "type": "string"
              },
              "extractionError": {
                "type": "string"
              },
              "withholdingNotice": {
                "type": "object",
                "description": "Plain-language reason this exhibit is withheld from the considered Record, with guidance for the submitting party.",
                "properties": {
                  "reason": {
                    "type": "string"
                  },
                  "action": {
                    "type": "string"
                  }
                },
                "required": [
                  "reason",
                  "action"
                ]
              },
              "neutralizedCount": {
                "type": "integer"
              }
            },
            "required": [
              "id",
              "label",
              "phase",
              "reliabilityTier",
              "contentHash",
              "neutralizedCount"
            ]
          }
        },
        "security": {
          "type": "object",
          "properties": {
            "neutralizedCount": {
              "type": "integer"
            },
            "quarantinedExhibits": {
              "type": "integer"
            },
            "attributableTo": {
              "type": "string",
              "enum": [
                "claimant",
                "respondent"
              ]
            }
          },
          "required": [
            "neutralizedCount",
            "quarantinedExhibits"
          ]
        },
        "sealed": {
          "type": "boolean"
        },
        "phase": {
          "type": "string"
        },
        "deadlines": {
          "type": "object",
          "properties": {
            "answer": {
              "type": "string"
            },
            "evidence": {
              "type": "string"
            },
            "rebuttal": {
              "type": "string"
            }
          }
        },
        "evidenceCandidateAdoptions": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "exportRecordId": {
                "type": "string"
              },
              "artifactRef": {
                "type": "string"
              },
              "evidenceObjectId": {
                "type": "string"
              },
              "sourceSha256": {
                "type": "string"
              }
            },
            "required": [
              "exportRecordId",
              "artifactRef",
              "evidenceObjectId",
              "sourceSha256"
            ]
          }
        }
      },
      "required": [
        "submission"
      ]
    },
    "requestId": {
      "type": "string"
    }
  },
  "required": [
    "data",
    "requestId"
  ]
}
```

### default

RFC 9457 style problem response.

application/problem+json

```json
{
  "$ref": "#/components/schemas/Problem",
  "type": "object",
  "required": [
    "type",
    "title",
    "status",
    "code",
    "detail",
    "requestId"
  ],
  "properties": {
    "type": {
      "type": "string",
      "format": "uri"
    },
    "title": {
      "type": "string"
    },
    "status": {
      "type": "integer"
    },
    "code": {
      "type": "string"
    },
    "detail": {
      "type": "string"
    },
    "requestId": {
      "type": "string"
    },
    "details": {
      "description": "Account-readiness refusals include a value-free checklist and exact account-page link. Other error codes may provide different details.",
      "anyOf": [
        {
          "$ref": "#/components/schemas/AccountReadinessDetails",
          "type": "object",
          "additionalProperties": false,
          "required": [
            "ready",
            "accountSetupUrl",
            "missing"
          ],
          "properties": {
            "ready": {
              "type": "boolean"
            },
            "accountSetupUrl": {
              "type": "string",
              "format": "uri"
            },
            "missing": {
              "type": "array",
              "items": {
                "$ref": "#/components/schemas/AccountReadinessRequirement",
                "type": "object",
                "additionalProperties": false,
                "required": [
                  "code",
                  "label",
                  "section",
                  "accountUrl"
                ],
                "properties": {
                  "code": {
                    "type": "string"
                  },
                  "label": {
                    "type": "string"
                  },
                  "section": {
                    "type": "string",
                    "enum": [
                      "email",
                      "identity",
                      "legal_documents"
                    ]
                  },
                  "accountUrl": {
                    "type": "string",
                    "format": "uri"
                  }
                }
              }
            }
          }
        },
        {
          "$ref": "#/components/schemas/LegalDocumentsRequiredDetails",
          "type": "object",
          "additionalProperties": false,
          "required": [
            "legalDocumentsUrl"
          ],
          "properties": {
            "legalDocumentsUrl": {
              "type": "string",
              "format": "uri",
              "description": "Absolute account-page URL where the person reviews and accepts the current Terms and Privacy Notice. Uses the configured public application origin. After accepting the documents, retry the original operation."
            },
            "ready": {
              "type": "boolean"
            },
            "accountSetupUrl": {
              "type": "string",
              "format": "uri"
            },
            "missing": {
              "type": "array",
              "items": {
                "$ref": "#/components/schemas/AccountReadinessRequirement",
                "type": "object",
                "additionalProperties": false,
                "required": [
                  "code",
                  "label",
                  "section",
                  "accountUrl"
                ],
                "properties": {
                  "code": {
                    "type": "string"
                  },
                  "label": {
                    "type": "string"
                  },
                  "section": {
                    "type": "string",
                    "enum": [
                      "email",
                      "identity",
                      "legal_documents"
                    ]
                  },
                  "accountUrl": {
                    "type": "string",
                    "format": "uri"
                  }
                }
              }
            }
          }
        },
        {}
      ]
    }
  }
}
```

## Example response

### Successful response

```json
{
  "data": {
    "submission": {
      "id": "id_test",
      "party": "claimant",
      "brief": "The attached test record supports this position.",
      "evidenceIds": [
        "evidenceIds_test"
      ],
      "submittedAt": "submittedAt_test"
    }
  },
  "requestId": "requestId_test"
}
```

## Errors

Read the response status and stable error code. See [errors](https://peoplescourt.ai/docs/api/errors.md) and [rate limits](https://peoplescourt.ai/docs/api/rate-limits.md) for recovery. Refresh the resource before resolving a state or digest conflict.

## Idempotency and retries

- For throttling, honor Retry-After when present. Back off on retryable server failures.
- Send a unique Idempotency-Key. An exact retry returns the stored result; reusing the key with a different request fails.
- The request is accepted only when its credential, authority, case state, and resource preconditions are satisfied.

**Likely next action:** [Review the side’s restatement →](https://peoplescourt.ai/docs/api/reference/getRecordSummaryPreview.md)

## Request examples

Use `https://peoplescourt.ai` with the test credential issued for your integration.

```sh
curl --request POST \
  --url 'https://peoplescourt.ai/api/cases/pcase_test_123/submissions' \
  --header 'Authorization: Bearer pk_test_replace_me' \
  --header 'Idempotency-Key: idem_test_12345678' \
  --header 'x-pc-party: claimant' \
  --form 'party=claimant' \
  --form 'brief=The attached test record supports this position.'
```

```ts
const form = new FormData();
form.set("party", "claimant");
form.set("brief", "The attached test record supports this position.");

const response = await fetch("https://peoplescourt.ai/api/cases/pcase_test_123/submissions", {
  method: "POST",
  headers: {
    "Authorization": "Bearer pk_test_replace_me",
    "Idempotency-Key": "idem_test_12345678",
    "x-pc-party": "claimant"
  },
  body: form,
});
if (!response.ok) throw await response.json();
const result = await response.json();
```

```python
import requests

response = requests.post(
    "https://peoplescourt.ai/api/cases/pcase_test_123/submissions",
    headers={
      "Authorization": "Bearer pk_test_replace_me",
      "Idempotency-Key": "idem_test_12345678",
      "x-pc-party": "claimant"
    },
    files={key: (None, value) for key, value in {"party": "claimant", "brief": "The attached test record supports this position."}.items()},
    timeout=30,
)
response.raise_for_status()
result = response.json()
```