Get Passage (Research)

researchmcp-research_get_chunk

Fetch a single text chunk by its stable id.

Use after research_chunk_search when you have a chunk_id and want the chunk back without re-running a search. Cheap direct id lookup.

chunk_id is an opaque id assigned when the chunk is indexed. It round-trips reliably within a session (search -> get). It is NOT durable across re-ingestion: the hourly cron deletes a report's docs and re-inserts them with new ids when the report is modified, so a chunk_id obtained before reprocessing will miss afterward. Fetch within the same session.

Parameters

Name	Type	Required	Constraints	Description
chunk_id	string	yes	—	The chunk_id returned by a previous research_chunk_search call.

Returns

• On hit: {"result": {"chunk": {report_id, title, date, score, text, chunk_id}}}.
• On miss: {"result": {"chunk": None}}. Not an error.
• On retrieval failure: {"error": {code, message}}
• code is upstream_unavailable, internal (our own bad
• data; a retry returns the same error), or not_entitled (authorization
• refused).
• The score field is 0.0 for direct id lookups (no relevance ranking applies).
• No tags here, unlike a search hit: the chunk search that gave you this
• chunk_id already returned the report's taxonomy tags. If you need the
• audience/season of the parent report and no longer have them, call
• research_get_report(report_id).

Try it

Loading interactive widget…

Code examples

curl

curl -s https://mcp.edited.com/mcp \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "MCP-Protocol-Version: 2025-06-18" \
  -H "x-api-key: $MCP_API_KEY" \
  -d '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "researchmcp-research_get_chunk",
    "arguments": {
      "chunk_id": "example"
    }
  }
}'

TypeScript

import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";

const client = new Client({ name: "demo", version: "1.0.0" }, { capabilities: {} });
await client.connect(
  new StreamableHTTPClientTransport(new URL("https://mcp.edited.com/mcp"), {
    requestInit: { headers: { "x-api-key": process.env.MCP_API_KEY ?? "" } },
  }),
);

const result = await client.callTool({
  name: "researchmcp-research_get_chunk",
  arguments: {
    "chunk_id": "example"
  },
});

Python

import os
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client

headers = {"x-api-key": os.environ["MCP_API_KEY"]}
async with streamablehttp_client("https://mcp.edited.com/mcp", headers=headers) as (read, write, _):
    async with ClientSession(read, write) as session:
        await session.initialize()
        result = await session.call_tool(
            "researchmcp-research_get_chunk",
            {"chunk_id": "example"},
        )

Input schema

{
  "type": "object",
  "properties": {
    "chunk_id": {
      "description": "The chunk_id returned by a previous research_chunk_search call.",
      "minLength": 1,
      "type": "string"
    }
  },
  "required": [
    "chunk_id"
  ]
}

Output schema

Describes both branches of the envelope — result on success, error on a refusal. Validate against this rather than pattern-matching the prose above; see Concepts → Response shape.

{
  "type": "object",
  "properties": {
    "result": {
      "properties": {
        "chunk": {
          "anyOf": [
            {
              "properties": {
                "report_id": {
                  "type": "integer"
                },
                "title": {
                  "type": "string"
                },
                "date": {
                  "format": "date",
                  "type": "string"
                },
                "score": {
                  "type": "number"
                },
                "text": {
                  "type": "string"
                },
                "chunk_id": {
                  "type": "string"
                }
              },
              "required": [
                "report_id",
                "title",
                "date",
                "score",
                "text",
                "chunk_id"
              ],
              "type": "object"
            },
            {
              "type": "null"
            }
          ]
        }
      },
      "required": [
        "chunk"
      ],
      "type": "object"
    },
    "error": {
      "type": "object",
      "description": "Present instead of `result` when the call was rejected. Branch on `code`; never string-match `message`.",
      "properties": {
        "code": {
          "type": "string",
          "enum": [
            "invalid_input",
            "not_entitled",
            "upstream_unavailable",
            "internal"
          ]
        },
        "message": {
          "type": "string"
        },
        "field": {
          "type": "string",
          "description": "Offending parameter, when the failure is attributable to one."
        },
        "details": {
          "type": "object",
          "additionalProperties": true
        }
      },
      "required": [
        "code",
        "message"
      ]
    }
  },
  "oneOf": [
    {
      "required": [
        "result"
      ]
    },
    {
      "required": [
        "error"
      ]
    }
  ],
  "x-fastmcp-wrap-result": true
}