# Read research original

Source: https://musicnerd-docs.vercel.app/api-reference/research/research-evidence

Read a public research original

## GET /api/artist/{id}/research/evidence/{evidenceId}

Full OpenAPI specification: https://musicnerd-docs.vercel.app/spec/question-research.json

## Authentication

This operation requires one of the security alternatives in the specification below. Security scheme definitions are included where present in the published specification.

[Authentication guide](https://musicnerd-docs.vercel.app/authentication)

## Operation and referenced schemas

```json
{
  "openapi": "3.1.0",
  "info": {
    "title": "Question-directed artist research",
    "version": "0.1.0",
    "description": "Preview contract. Apply the Web-owned research schema before enabling the matching API implementation."
  },
  "servers": [
    {
      "url": "https://musicnerd-api.vercel.app"
    }
  ],
  "paths": {
    "/api/artist/{id}/research/evidence/{evidenceId}": {
      "get": {
        "summary": "Read a public research original",
        "description": "Reopen an exact source/revision/window. A URL-encoded discovery:UUID, vault:UUID or social:UUID:caption|transcript sourceId is accepted; a bare evidence UUID remains supported. Saved Lore/social reads use the current eligible public revision and return 409 on change. Retained discovery versions remain readable while current curation and access permit them. Uploaded/private material and interview history are excluded. Current claimant/admin may inspect unresolved discoveries for review.",
        "security": [
          {
            "PrivyAuth": []
          },
          {
            "ResearchService": []
          }
        ],
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          },
          {
            "name": "evidenceId",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "description": "URL-encoded sourceId from a returned reference, or a discovery evidence UUID"
            }
          },
          {
            "name": "revision",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string",
              "pattern": "^[a-f0-9]{64}$"
            }
          },
          {
            "name": "start",
            "in": "query",
            "schema": {
              "type": "integer",
              "minimum": 0,
              "default": 0,
              "maximum": 4000000
            }
          },
          {
            "name": "maxChars",
            "in": "query",
            "schema": {
              "type": "integer",
              "minimum": 256,
              "maximum": 12000,
              "default": 4000
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Success",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": [
                    "status",
                    "passage",
                    "totalChars",
                    "nextStart"
                  ],
                  "properties": {
                    "status": {
                      "const": "ok"
                    },
                    "passage": {
                      "$ref": "#/components/schemas/Reference"
                    },
                    "totalChars": {
                      "type": "integer"
                    },
                    "nextStart": {
                      "type": [
                        "integer",
                        "null"
                      ]
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Invalid input",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "401": {
            "description": "Missing or invalid authentication",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "403": {
            "description": "Current claimant/admin required for private operations",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "404": {
            "description": "Unavailable artist, job or evidence",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "409": {
            "description": "State or revision changed",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "413": {
            "description": "Evidence exceeds supported bounds",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "429": {
            "description": "Research quota or active-work limit",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          },
          "503": {
            "description": "Storage, credential or provider unavailable",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/Error"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Reference": {
        "type": "object",
        "required": [
          "sourceId",
          "revision",
          "start",
          "end",
          "text",
          "url",
          "curation"
        ],
        "properties": {
          "sourceId": {
            "type": "string"
          },
          "revision": {
            "type": "string"
          },
          "start": {
            "type": "integer",
            "minimum": 0
          },
          "end": {
            "type": "integer",
            "minimum": 0
          },
          "text": {
            "type": "string"
          },
          "url": {
            "type": "string"
          },
          "curation": {
            "type": "string",
            "enum": [
              "approved",
              "pending"
            ]
          },
          "evidenceKind": {
            "type": "string",
            "enum": [
              "original_text",
              "caption",
              "provider_transcript"
            ]
          },
          "speaker": {
            "type": "string",
            "enum": [
              "not_applicable",
              "unverified"
            ]
          },
          "publishedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "retrievedAt": {
            "type": [
              "string",
              "null"
            ]
          },
          "truncated": {
            "type": [
              "boolean",
              "null"
            ]
          }
        }
      },
      "Error": {
        "type": "object",
        "required": [
          "status",
          "error",
          "code"
        ],
        "properties": {
          "status": {
            "const": "error"
          },
          "error": {
            "type": "string"
          },
          "code": {
            "type": "string"
          }
        }
      }
    },
    "securitySchemes": {
      "PrivyAuth": {
        "type": "http",
        "scheme": "bearer",
        "description": "Current artist claimant or administrator Privy access token."
      },
      "ResearchService": {
        "type": "apiKey",
        "in": "header",
        "name": "X-MusicNerd-Research-Key",
        "description": "Server-only MUSICNERD_RESEARCH_API_KEY. Public evidence research only; never grants review or interview-history access."
      }
    }
  }
}
```