`polymer_entity`

Pack: rcsb-pdb · Endpoint: https://gateway.pipeworx.io/rcsb-pdb/mcp

“Chain [N] of PDB [ID]” / “sequence of chain in [pdb_id]” — fetch the polymer-entity (protein/DNA/RNA chain) metadata for a specific PDB entry. Returns sequence, source organism, UniProt cross-references, GO annotations. Use to drill into one chain of a multi-chain structure.

Parameters

Name	Type	Required	Description
`pdb_id`	string	yes
`entity_id`	string	yes

Example call

Arguments

{
  "pdb_id": "1abc",
  "entity_id": "1"
}

curl

curl -X POST https://gateway.pipeworx.io/rcsb-pdb/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"polymer_entity","arguments":{"pdb_id":"1abc","entity_id":"1"}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('polymer_entity', {
  "pdb_id": "1abc",
  "entity_id": "1"
});

Response shape

Full JSON Schema

{
  "type": "object",
  "description": "Polymer entity (chain) metadata record"
}

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "rcsb-pdb": {
      "url": "https://gateway.pipeworx.io/rcsb-pdb/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

polymer_entity