Grove's MCP Server for Pocket Network

Instructions

Implementation Reference

• src/handlers/cosmos-handlers.ts:404-420 (handler)

  MCP tool handler case that parses input arguments, calls the service method, and formats the response.

  case 'get_cosmos_all_balances': {
    const blockchain = args?.blockchain as string;
    const address = args?.address as string;
    const network = (args?.network as 'mainnet' | 'testnet') || 'mainnet';
  
    const result = await cosmosService.getAllBalances(blockchain, address, network);
  
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(result, null, 2),
        },
      ],
      isError: !result.success,
    };
  }

• src/handlers/cosmos-handlers.ts:42-64 (registration)

  Tool registration definition including name, description, and input schema used by registerCosmosHandlers.

  {
    name: 'get_cosmos_all_balances',
    description: 'Get all token balances for a Cosmos SDK address',
    inputSchema: {
      type: 'object',
      properties: {
        blockchain: {
          type: 'string',
          description: 'Blockchain name (e.g., "osmosis", "juno", "kava")',
        },
        address: {
          type: 'string',
          description: 'Cosmos address',
        },
        network: {
          type: 'string',
          enum: ['mainnet', 'testnet'],
          description: 'Network type (defaults to mainnet)',
        },
      },
      required: ['blockchain', 'address'],
    },
  },

• src/services/cosmos-service.ts:101-117 (helper)

  Service method implementing the core logic: constructs Cosmos REST API URL for all balances and fetches data.

  async getAllBalances(
    blockchain: string,
    address: string,
    network: 'mainnet' | 'testnet' = 'mainnet'
  ): Promise<EndpointResponse> {
    try {
      const baseUrl = this.getRestUrl(blockchain, network);
      const url = `${baseUrl}/cosmos/bank/v1beta1/balances/${address}`;
  
      return this.fetchRest(url);
    } catch (error) {
      return {
        success: false,
        error: error instanceof Error ? error.message : 'Failed to get Cosmos balances',
      };
    }
  }