CoinCap

```json
{
  "service_type": "crypto_app",
  "base_url": "https://rest.coincap.io",
  "auth_method": "api_key_header",
  "auth_config": {
    "header_name": "Authorization",
    "format": "Bearer {api_key}",
    "prepaid_endpoint": "/v3/prepaid/create"
  },
  "endpoints": [
    {"path": "/v2/assets", "method": "GET", "purpose": "list cryptocurrencies with market data"},
    {"path": "/v2/assets/{id}", "method": "GET", "purpose": "get specific cryptocurrency details"},
    {"path": "/v2/assets/{id}/history", "method": "GET", "purpose": "historical price data"},
    {"path": "/v2/assets/{id}/markets", "method": "GET", "purpose": "markets trading specific asset"},
    {"path": "/v2/exchanges", "method": "GET", "purpose": "list cryptocurrency exchanges"},
    {"path": "/v2/markets", "method": "GET", "purpose": "trading pairs and market data"},
    {"path": "/v2/rates", "method": "GET", "purpose": "exchange rates"},
    {"path": "/v2/candles", "method": "GET", "purpose": "candlestick chart data"}
  ],
  "pricing_model": {
    "type": "prepaid_credits",
    "details": {
      "free_credits": 100,
      "payment_methods": ["USDC_on_Base", "x402_protocol"],
      "accountless": true
    }
  },
  "rate_limits": {
    "rpm": 200,
    "daily_limit": 10000
  },
  "capabilities": [
    "market_data",
    "portfolio_tracking", 
    "price_history",
    "exchange_data",
    "real_time_prices"
  ],
  "crypto_specifics": {
    "supported_chains": ["bitcoin", "ethereum", "multi_chain"],
    "token_count": 1000,
    "has_websocket": true,
    "has_orderbook": false,
    "fee_structure": "data_provider",
    "security_features": ["x402_protocol", "prepaid_system", "mcp_support"],
    "data_coverage": {
      "real_time": true,
      "historical": true,
      "exchanges": true,
      "market_caps": true,
      "volume_data": true
    },
    "special_features": {
      "mcp_endpoint": "https://rest.coincap.io/mcp",
      "x402_support": true,
      "accountless_access": true,
      "openapi_spec": "https://rest.coincap.io/api-docs.json"
    }
  }
}
```

```json
{
  "tests": [
    {
      "name": "list_assets",
      "endpoint": "/v2/assets",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns list of cryptocurrencies with market data",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1,
        "required_fields": ["id", "rank", "symbol", "name", "priceUsd", "marketCapUsd"]
      }
    },
    {
      "name": "get_bitcoin_details",
      "endpoint": "/v2/assets/bitcoin",
      "method": "GET", 
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns Bitcoin market data and details",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "object",
        "required_fields": ["id", "symbol", "name", "priceUsd", "marketCapUsd", "volumeUsd24Hr"]
      }
    },
    {
      "name": "get_bitcoin_history",
      "endpoint": "/v2/assets/bitcoin/history",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns historical price data for Bitcoin",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1,
        "required_fields": ["priceUsd", "time"]
      }
    },
    {
      "name": "list_exchanges",
      "endpoint": "/v2/exchanges",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns list of cryptocurrency exchanges",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1,
        "required_fields": ["id", "name", "rank"]
      }
    },
    {
      "name": "get_markets",
      "endpoint": "/v2/markets",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns trading pairs and market data",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1,
        "required_fields": ["exchangeId", "baseId", "quoteId", "priceUsd"]
      }
    },
    {
      "name": "get_exchange_rates",
      "endpoint": "/v2/rates",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns exchange rates",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1,
        "required_fields": ["id", "symbol", "rateUsd"]
      }
    },
    {
      "name": "get_candles_data",
      "endpoint": "/v2/candles",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns candlestick chart data",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array"
      }
    },
    {
      "name": "test_invalid_asset",
      "endpoint": "/v2/assets/nonexistent-asset-xyz",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 404,
      "expected_behavior": "Returns 404 for invalid asset ID",
      "metrics": ["status_code", "error_handling"],
      "validation": {
        "field": "error",
        "type": "string"
      }
    },
    {
      "name": "test_rate_limit_headers",
      "endpoint": "/v2/assets",
      "method": "GET",
      "headers": {},
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns rate limit headers",
      "metrics": ["status_code"],
      "validation": {
        "check_headers": ["X-RateLimit-Remaining", "X-RateLimit-Reset"]
      }
    },
    {
      "name": "test_authenticated_request",
      "endpoint": "/v2/assets",
      "method": "GET",
      "headers": {
        "Authorization": "Bearer {api_key}"
      },
      "payload": {},
      "expected_status": 200,
      "expected_behavior": "Returns data with API key authentication",
      "metrics": ["latency", "accuracy", "status_code"],
      "validation": {
        "field": "data",
        "type": "array",
        "min_length": 1
      }
    }
  ],
  "pricing_probes": [
    {
      "name": "verify_credit_consumption",
      "description": "Make authenticated request to check credit usage",
      "endpoint": "/v2/assets",
      "method": "GET",
      "payload": {},
      "check": "response.headers should include credit usage information"
    },
    {
      "name": "test_prepaid_endpoint",
      "description": "Verify prepaid credit creation endpoint exists",
      "endpoint": "/v3/prepaid/create",
      "method": "POST",
      "payload": {
        "amount": 1,
  

0/10 tests passed

```json
{
  "overall": 5,
  "dimensions": {
    "token_efficiency": 0.0,
    "first_try_success": 0.0,
    "response_parseability": 0.0,
    "error_clarity": 2.0,
    "doc_quality": 0.0,
    "auth_simplicity": 0.0,
    "latency": 3.0,
    "consistency": 0.0
  },
  "pricing_normalized": {
    "maker_fee_bps": null,
    "taker_fee_bps": null,
    "withdrawal_fee_usd": null,
    "free_tier_requests": null
  },
  "issues": [
    "All API endpoints return 404 - service appears completely non-functional",
    "Expected JSON responses but receiving HTML error pages",
    "Cannot GET errors on all /v2/* endpoints suggest server misconfiguration",
    "No crypto market data, exchange data, or any functionality accessible",
    "Documentation likely outdated - endpoints don't exist on server"
  ],
  "recommendations": [
    "Fix server configuration to serve API endpoints properly",
    "Implement /v2/assets, /v2/exchanges, /v2/markets endpoints",
    "Update documentation to match actual available endpoints",
    "Test basic API functionality before deployment",
    "Ensure proper JSON content-type headers for API responses",
    "Add proper API error handling instead of generic HTML pages"
  ]
}
```