# `worldbank__worldbank_list_topics`

**List World Bank Topics**

List all 21 World Bank thematic topics (Economy & Growth, Health, Education, and others) with descriptions. Use it to browse the indicator space by theme or to find a topic_id for worldbank_search_indicators.

- Server: [World Bank](https://gateway.mcpharbor.dev/docs/servers/worldbank) (`dev.mcpharbor.gateway/worldbank`)
- Price per call: $0.0001 (100 micro-USD); only tools/call is charged
- Endpoint: `https://gateway.mcpharbor.dev/mcp` or `https://gateway.mcpharbor.dev/mcp/worldbank`
- Upstream tool: exposed by the provider; called through this gateway as `worldbank__worldbank_list_topics`
- Provider terms: <https://data.worldbank.org/summary-terms-of-use> (verified 2026-09-19)
- Upstream API documentation: <https://datahelpdesk.worldbank.org/knowledgebase/articles/889392-about-the-indicators-api-documentation>
- Rate limit: 500 requests per minute
- Attribution required: "The World Bank: Dataset name: Data source (if known)"; same acknowledgment must be passed to sub-licensees

## Parameters

- This tool takes no parameters. Send `"arguments": {}`.

## Example call

Request headers and body:

```http
POST /mcp HTTP/1.1
Host: gateway.mcpharbor.dev
Authorization: Bearer <your gateway API key>
Content-Type: application/json
Accept: application/json, text/event-stream
MCP-Protocol-Version: 2026-07-28
Mcp-Method: tools/call
Mcp-Name: worldbank__worldbank_list_topics
```

```json
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "_meta": {
      "io.modelcontextprotocol/clientCapabilities": {},
      "io.modelcontextprotocol/clientInfo": {
        "name": "example-agent",
        "version": "1.0.0"
      },
      "io.modelcontextprotocol/protocolVersion": "2026-07-28"
    },
    "arguments": {},
    "name": "worldbank__worldbank_list_topics"
  }
}
```

A successful response:

```json
{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "_meta": {
      "dev.mcpharbor.gateway/call": {
        "chargedMicroUsd": 100,
        "id": "<the id of this charge>"
      }
    },
    "content": [
      {
        "text": "<whatever the upstream tool returned>",
        "type": "text"
      }
    ],
    "resultType": "complete"
  }
}
```

This call costs $0.0001 (100 micro-USD). Reading this page and listing the tool cost nothing.
The `dev.mcpharbor.gateway/call` record in the result is the receipt for that charge. Each
POST is metered separately, so sending the same call again buys another one: see
[agent.txt](https://gateway.mcpharbor.dev/agent.txt), section 7, before retrying.

## Attribution

This provider requires the attribution below wherever you use results from its tools.
Reproduce it verbatim:

> "The World Bank: Dataset name: Data source (if known)"; same acknowledgment must be passed to sub-licensees

## Tool definition

Exactly as `tools/list` returns it (free):

```json
{
  "_meta": {
    "dev.mcpharbor.gateway/pricing": {
      "currency": "USD",
      "pricePerCallMicroUsd": 100
    }
  },
  "annotations": {
    "idempotentHint": true,
    "openWorldHint": true,
    "readOnlyHint": true
  },
  "description": "List all 21 World Bank thematic topics (Economy & Growth, Health, Education, and others) with descriptions. Use it to browse the indicator space by theme or to find a topic_id for worldbank_search_indicators.",
  "inputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "additionalProperties": false,
    "properties": {},
    "type": "object"
  },
  "name": "worldbank__worldbank_list_topics",
  "outputSchema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "additionalProperties": false,
    "anyOf": [
      {
        "not": {
          "required": [
            "error"
          ]
        },
        "required": [
          "topics"
        ]
      },
      {
        "required": [
          "error"
        ]
      }
    ],
    "properties": {
      "error": {
        "additionalProperties": {},
        "description": "Present when the call failed. Absent on success.",
        "properties": {
          "code": {
            "description": "JSON-RPC error code for this failure.",
            "maximum": 9007199254740991,
            "minimum": -9007199254740991,
            "type": "integer"
          },
          "data": {
            "additionalProperties": {},
            "properties": {
              "reason": {
                "description": "Machine-readable failure mode.",
                "type": "string"
              },
              "recovery": {
                "additionalProperties": {},
                "description": "Actionable next step for the caller.",
                "properties": {
                  "hint": {
                    "type": "string"
                  }
                },
                "required": [
                  "hint"
                ],
                "type": "object"
              },
              "retryable": {
                "description": "Whether retrying may succeed.",
                "type": "boolean"
              }
            },
            "type": "object"
          },
          "message": {
            "description": "Human-readable description of what went wrong.",
            "type": "string"
          }
        },
        "required": [
          "code",
          "message"
        ],
        "type": "object"
      },
      "topics": {
        "description": "All 21 World Bank thematic topics.",
        "items": {
          "additionalProperties": false,
          "description": "A thematic topic entry.",
          "properties": {
            "id": {
              "description": "Topic ID for use in worldbank_search_indicators.",
              "type": "string"
            },
            "name": {
              "description": "Topic name.",
              "type": "string"
            },
            "sourceNote": {
              "description": "Brief description of the topic.",
              "type": "string"
            }
          },
          "required": [
            "id",
            "name",
            "sourceNote"
          ],
          "type": "object"
        },
        "type": "array"
      }
    },
    "type": "object"
  },
  "title": "List World Bank Topics"
}
```