Manifold Markets MCP Server

Instructions

Implementation Reference

• src/index.ts:823-859 (handler)

  Handler for the 'close_market' tool. Parses input parameters using CloseMarketSchema, checks for API key, makes a POST request to Manifold Markets API to close the specified market, and returns a success message.

  case 'close_market': {
    const params = CloseMarketSchema.parse(args);
    const apiKey = process.env.MANIFOLD_API_KEY;
    if (!apiKey) {
      throw new McpError(
        ErrorCode.InternalError,
        'MANIFOLD_API_KEY environment variable is required'
      );
    }
  
    const response = await fetch(`${API_BASE}/v0/market/${params.contractId}/close`, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        Authorization: `Key ${apiKey}`,
      },
      body: JSON.stringify({
        closeTime: params.closeTime,
      }),
    });
  
    if (!response.ok) {
      throw new McpError(
        ErrorCode.InternalError,
        `Manifold API error: ${response.statusText}`
      );
    }
  
    return {
      content: [
        {
          type: 'text',
          text: 'Market closed successfully',
        },
      ],
    };
  }

• src/index.ts:97-100 (schema)

  Zod schema defining the input parameters for the close_market tool: contractId (required string) and closeTime (optional nonnegative integer Unix timestamp).

  const CloseMarketSchema = z.object({
    contractId: z.string(),
    closeTime: z.number().int().nonnegative().optional(),
  });

• src/index.ts:325-336 (registration)

  MCP tool registration for 'close_market', including name, description, and JSON input schema matching the Zod schema.

  {
    name: 'close_market',
    description: 'Close a market for trading',
    inputSchema: {
      type: 'object',
      properties: {
        contractId: { type: 'string', description: 'Market ID' },
        closeTime: { type: 'number', description: 'Optional. Unix timestamp in milliseconds when market will close' }
      },
      required: ['contractId']
    }
  },