WebCite MCP Server

MCP (Model Context Protocol) server for WebCite - enables AI assistants to verify factual claims against authoritative sources.

Works with Claude Desktop, Claude Code, Cursor, Continue, Cody, Zed, and any MCP-compatible client.

Features

| Tool | Description | Credits |
|------|-------------|---------|
| verify_claim | Full fact verification with stance analysis and verdict | 2-4 |
| search_sources | Quick citation search without analysis | 2 |
| list_citations | List your past verifications | Free |
| get_citation | Get details of a specific verification | Free |

Installation

$3

Add to claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

``json
{
"mcpServers": {
"webcite": {
"command": "npx",
"args": ["-y", "webcite-mcp-server"],
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
}
}
`

$3

`bash


Add to Claude Code

claude mcp add webcite -- npx -y webcite-mcp-server

Set API key

export WEBCITE_API_KEY=wc_your_api_key_here
`

Or add to ~/.claude/claude_settings.json:

`json
{
"mcpServers": {
"webcite": {
"command": "npx",
"args": ["-y", "webcite-mcp-server"],
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
}
}
`

$3

Add to .cursor/mcp.json in your project or ~/.cursor/mcp.json globally:

`json
{
"mcpServers": {
"webcite": {
"command": "npx",
"args": ["-y", "webcite-mcp-server"],
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
}
}
`

$3

Add to ~/.continue/config.json:

`json
{
"experimental": {
"modelContextProtocolServers": [
{
"transport": {
"type": "stdio",
"command": "npx",
"args": ["-y", "webcite-mcp-server"]
},
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
]
}
}
`

$3

Add to VS Code settings (settings.json):

`json
{
"cody.experimental.mcp.servers": {
"webcite": {
"command": "npx",
"args": ["-y", "webcite-mcp-server"],
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
}
}
`

$3

Add to ~/.config/zed/settings.json:

`json
{
"context_servers": {
"webcite": {
"command": {
"path": "npx",
"args": ["-y", "webcite-mcp-server"]
},
"env": {
"WEBCITE_API_KEY": "wc_your_api_key_here"
}
}
}
}
`

$3

`bash


Install globally

npm install -g webcite-mcp-server

Run with API key

WEBCITE_API_KEY=wc_xxx webcite-mcp-server

Or with npx (no install)

WEBCITE_API_KEY=wc_xxx npx webcite-mcp-server
`

Getting Your API Key

1. Sign up at webcite.co
2. Log in and go to API Keys in the sidebar
3. Create a new API key
4. Add it to your MCP configuration

Usage Examples

$3

`
User: Verify this claim: "The Great Wall of China is visible from space"

Fact Check: "The Great Wall of China is visible from space"

Verdict: ✗ CONTRADICTED

Confidence: 92%
Summary: Multiple authoritative sources confirm this is a common misconception.

Source Breakdown:
- Supporting: 0
- Contradicting: 4
- Neutral: 1

Sources

1. NASA - Great Wall of China
URL: https://www.nasa.gov/...
Stance: ✗ contradicts (95% confidence)
Credibility: 98/100
Analysis: NASA explicitly states the wall is not visible from low Earth orbit...
`

$3

`
User: Search for sources about "quantum computing breakthroughs 2024"

Search Results: "quantum computing breakthroughs 2024"

Found 8 sources:

1. Nature - Quantum Error Correction Milestone
URL: https://nature.com/...
Credibility: 95/100
Snippet: "Researchers achieved a significant breakthrough in..."
`

$3

`
User: Show my recent fact-checks

Your Verification History

Page 1 of 3 (28 total)

1. The Earth is 4.5 billion years old
ID: abc123...
Date: Jan 30, 2025

2. Coffee causes cancer
ID: def456...
Date: Jan 29, 2025
`

Tool Details

$3

Full fact verification with optional stance analysis and verdict generation.

Parameters:
- claim (required): The factual claim to verify
- include_stance (optional, default: true): Include stance analysis per source (+1 credit)
- include_verdict (optional, default: true): Generate overall verdict (+1 credit)
- decompose_claim (optional, default: false): Break complex claims into sub-claims

Credit Cost:
- Base search: 2 credits
- With stance: +1 credit
- With verdict: +1 credit
- Full verification: 4 credits

$3

Quick citation search without analysis - returns raw sources.

Parameters:
- query (required): Search query or claim
- limit (optional, default: 10): Max sources to return (1-20)

Credit Cost: 2 credits

$3

List your past verification results.

Parameters:
- page (optional, default: 1): Page number
- limit (optional, default: 10): Results per page (max 50)
- thread_id (optional): Filter by conversation thread

Credit Cost: Free

$3

Get full details of a specific verification.

Parameters:
- citation_id (required): The citation ID to retrieve

Credit Cost: Free

Environment Variables

| Variable | Description | Default |
|----------|-------------|---------|
| WEBCITE_API_KEY | Your WebCite API key (required) | - |
| WEBCITE_API_URL | API base URL | https://api.webcite.co` |

Response Format

All verification results include:

- Verdict: Overall assessment (supported/contradicted/mixed/unverifiable)
- Confidence: 0-100% confidence score
- Sources: List of authoritative citations
- Stance Analysis: Per-source support/contradict assessment
- Key Findings: Important facts extracted from sources
- Corrections: When the claim contains inaccuracies

Pricing

| Plan | Monthly Credits | Price |
|------|-----------------|-------|
| Free | 100 | $0 |
| Builder | 500 | $20/month |
| Enterprise | 10,000+ | Contact Sales |

Support

- Documentation: webcite.co/api-docs/playground
- Email: support@webcite.co

License

MIT