uno

name	uno
description	Call 1500+ tools (from 134+ MCP Servers) via curl — zero install. Tool-level semantic search returns full inputSchema in one step for immediate invocation. Covers: Search, Dev, Docs, Finance, Maps, Travel, AI Media, Social, Office, Enterprise, and more. Use this skill whenever the user wants to call any external tool, API, or service — even if they just say search the web, check the weather, query GitHub, look up stocks, send an email, generate an image, or run a script.
homepage	https://mcpmarket.cn
license	MIT
metadata	{"emoji":"🔧","category":"tools"}

Uno MCP Tools

Call MCPMarket REST APIs directly via curl to search and invoke 1500+ tools from 134+ MCP Servers. No package installation required.

Prerequisites

• curl (pre-installed on all systems)

Authentication

# 1. Request a device code
curl -s -X POST https://mcpmarket.cn/oauth/device/code \
  -d "client_id=skill-agent&scope=mcp:*"

Always copy the verification_uri and user_code from terminal output verbatim to display to the user — never construct or modify the URL yourself.

# 2. Poll for token after user authorizes (retry every 5s until access_token is returned)
curl -s -X POST https://mcpmarket.cn/oauth/token \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "grant_type=urn:ietf:params:oauth:grant-type:device_code&device_code=DEVICE_CODE&client_id=skill-agent"

# 3. Store the token securely
mkdir -p ~/.uno && chmod 700 ~/.uno
echo "ACCESS_TOKEN_VALUE" > ~/.uno/token && chmod 600 ~/.uno/token

Verify login:

curl -s https://mcpmarket.cn/api/uno/verify-token \
  -H "Authorization: Bearer $(cat ~/.uno/token)"

Two-Step Invocation (Core Flow)

# Step 1: Search tools — get tool_name and inputSchema
curl -s "https://mcpmarket.cn/api/uno/search-tools?q=weather&mode=hybrid&limit=5" \
  -H "Authorization: Bearer $(cat ~/.uno/token)"

# Step 2: Call the tool
curl -s -X POST https://mcpmarket.cn/api/uno/call-tool \
  -H "Authorization: Bearer $(cat ~/.uno/token)" \
  -H "Content-Type: application/json" \
  -d '{"tool_name":"tonghu-weather.weatherArea","arguments":{"area":"Beijing"}}'

API Endpoints

Endpoint	Method	Description
/api/uno/search-tools	GET	Search tools (main entry) — returns tools + full inputSchema
/api/uno/search-servers	GET	Search servers
/api/uno/call-tool	POST	Call a tool (format: server_name.tool_name)
/api/uno/categories	GET	List all categories with counts
/api/uno/rate-server	POST	Rate after use — influences search ranking

All endpoints use base URL https://mcpmarket.cn and require an Authorization: Bearer <token> header.

search-tools Parameters

Parameter	Type	Description
q	string	Search keywords
category	string	Browse by category, e.g. Search, Dev, Finance, Social
mode	string	keyword (exact) / semantic / hybrid (recommended)
limit	int	Number of results, default 5, max 15

Returns: tools[] (with tool, desc, inputSchema), uncached (servers requiring connection first)

Search keyword tips: The vector database indexes tool functional descriptions. Search terms should match tool capabilities, not specific query intents.

• Good: weather — matches weather tool descriptions
• Bad: Shanghai weather tomorrow — reads like a query intent, less likely to match tools

call-tool Parameters

Parameter	Type	Description
tool_name	string	Required — format server_name.tool_name (from the tool field of search-tools)
arguments	object	Required — construct according to inputSchema

Response structure:

{"content": [{"type": "text", "text": "<JSON string>"}], "isError": false}

content[0].text is itself a JSON string that needs secondary parsing. On error, isError is true and the error field contains the error message.

Downstream OAuth: When calling certain services (e.g. GitHub, Notion) for the first time, the response will be:

{"auth_required": true, "auth_url": "https://...", "state_id": "..."}

Open auth_url to complete authorization, then simply retry the call — the platform links everything server-side automatically.

Parameter Construction Rules (Must Read)

Always read inputSchema before calling — never guess parameters. Checklist:

Check	Why	Lesson Learned
required fields	Must provide every one	Missing fields cause errors
minLength: 1	Cannot pass empty string ""	Notion search with empty query returns nothing
Copy field names from schema verbatim	Don't write from memory	filter vs filters — one letter causes failure
enum constraints	Only pass values within the enum	Wrong values cause silent failure
description	Read when field meaning is unclear	Prevents format errors

Standard two-step flow (never skip step 1):

# Step 1: search-tools, read inputSchema (mandatory every time)
curl -s "https://mcpmarket.cn/api/uno/search-tools?q=<capability_keyword>&mode=hybrid&limit=5" \
  -H "Authorization: Bearer $(cat ~/.uno/token)"
# → Carefully check required / minLength / field names / enum

# Step 2: Construct correct parameters from schema and call
curl -s -X POST https://mcpmarket.cn/api/uno/call-tool \
  -H "Authorization: Bearer $(cat ~/.uno/token)" \
  -H "Content-Type: application/json" \
  -d '{"tool_name":"<tool>","arguments":{<fill per schema>}}'

Workflow Recommendations

1. Always search-tools first, read inputSchema before calling — this is the most important step, never skip it
2. Search terms should match tool capabilities, not query intents — weather is good, Shanghai weather tomorrow is bad
3. Copy parameter names from schema verbatim — don't guess; filters is not filter
4. No results? — try English keywords, or switch to mode=semantic

Credential Reference

Item	Value
Token file	~/.uno/token (permissions 0600)
API Base URL	https://mcpmarket.cn
Logout	rm ~/.uno/token