CCXT MCP Server

fetchMarkets

Retrieve market data from cryptocurrency exchanges to access trading pairs, symbols, and exchange-specific information for analysis and trading decisions.

Instructions

Fetch markets from a cryptocurrency exchange

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "exchangeId": "<exchangeId>"
    },
    "name": "fetchMarkets"
  }
}

Input Schema

Name	Required	Description	Default
`exchangeId`	Yes	Exchange ID (e.g., 'binance', 'coinbase')

Schema Changelog

Changes observed during successful MCP inspections.

First observedAug 18, 2025

TDQS

C2.9/5.0

Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries full burden for behavioral disclosure. It only states the basic action without mentioning rate limits, authentication requirements, response format, pagination, or what 'markets' specifically includes (trading pairs, symbols, etc.). For a data-fetching tool with zero annotation coverage, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with no wasted words. It's appropriately sized for a simple tool and gets straight to the point without unnecessary elaboration.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a data retrieval tool with no annotations and no output schema, the description should provide more context about what 'markets' includes, response format, and behavioral constraints. The current description is too minimal given the lack of structured information about the tool's behavior and output.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already fully documents the single 'exchangeId' parameter. The description doesn't add any additional meaning about parameters beyond what's in the schema, meeting the baseline expectation when schema coverage is complete.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'fetch' and resource 'markets from a cryptocurrency exchange', making the purpose immediately understandable. It doesn't specifically distinguish from sibling tools like 'fetchTicker' or 'fetchTickers', but the resource specificity is adequate for basic understanding.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives like 'fetchTicker' (single market) or 'fetchTickers' (multiple markets). The description only states what it does, not when it's appropriate or what distinguishes it from similar sibling tools.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.