# SignalStack
> SignalStack is a verification API platform for AI agents. Autonomous systems use SignalStack to verify claims, documents, businesses, and media in real time — with trust scores, evidence chains, and sub-200ms response times across 11 registered data sources (5 active by default, 6 require API key configuration).

## Core Pages
- [Home](https://signal-stack-ten.vercel.app/): Platform overview — four verification APIs (business, document, media, claim), trust scoring, SDKs
- [Product](https://signal-stack-ten.vercel.app/product): AI verification APIs purpose-built for agents
- [Pricing](https://signal-stack-ten.vercel.app/pricing): Usage-based plans from free to custom Enterprise
- [Enterprise](https://signal-stack-ten.vercel.app/enterprise): Enterprise-grade verification platform
- [Compare](https://signal-stack-ten.vercel.app/compare): SignalStack vs. building in-house
- [Docs](https://signal-stack-ten.vercel.app/docs): Full documentation, API reference, guides, SDKs
- [Blog](https://signal-stack-ten.vercel.app/blog): 21 articles on AI verification, deepfakes, trust scoring
- [Changelog](https://signal-stack-ten.vercel.app/changelog): Product updates and release notes
- [About](https://signal-stack-ten.vercel.app/about): Company mission and team
- [Careers](https://signal-stack-ten.vercel.app/careers): Open positions
- [Contact](https://signal-stack-ten.vercel.app/contact): Get in touch
- [Security](https://signal-stack-ten.vercel.app/security): Security practices, SOC 2, compliance
- [Status](https://signal-stack-ten.vercel.app/status): System status and incidents
- [Open Source](https://signal-stack-ten.vercel.app/open-source): Open source philosophy and projects
- [Whitelist Badge](https://signal-stack-ten.vercel.app/trust-badge): Verified by SignalStack badge
- [Verified](https://signal-stack-ten.vercel.app/verified): Integrate SignalStack verification
- [Whitepaper](https://signal-stack-ten.vercel.app/whitepaper): Trust infrastructure for AI agents — full whitepaper

## Product Pages
- [Business Verification](https://signal-stack-ten.vercel.app/product/business-verification): Verify company registration, tax IDs, officers against government registries
- [Document Analysis](https://signal-stack-ten.vercel.app/product/document-analysis): Detect tampering, AI generation, metadata manipulation in PDFs and images
- [Media Provenance](https://signal-stack-ten.vercel.app/product/media-provenance): C2PA provenance, deepfake detection, EXIF analysis for images and video
- [Claim Verification](https://signal-stack-ten.vercel.app/product/claim-verification): Fact-check against Google Fact Check, Wikipedia, GDELT, Semantic Scholar
- [Anomaly Detection](https://signal-stack-ten.vercel.app/product/anomaly-detection): Detect behavioral anomalies in agent actions and data patterns
- [Custom Trust Models](https://signal-stack-ten.vercel.app/product/custom-trust-models): Tune verification thresholds and scoring for your use case

## Solutions
- [Fintech](https://signal-stack-ten.vercel.app/solutions/fintech): KYC, fraud prevention, compliance automation
- [Healthcare](https://signal-stack-ten.vercel.app/solutions/healthcare): Medical record verification, clinical data integrity
- [Supply Chain](https://signal-stack-ten.vercel.app/solutions/supply-chain): Supplier verification, document authenticity, compliance

## Documentation
### Getting Started
- [Getting Started](https://signal-stack-ten.vercel.app/docs/getting-started): Start here — authentication, your first API call
- [Quickstart](https://signal-stack-ten.vercel.app/docs/quickstart): Run your first verification in 5 minutes

### Guides
- [Authentication](https://signal-stack-ten.vercel.app/docs/guides/authentication): API key management, header format, environment setup
- [Error Handling](https://signal-stack-ten.vercel.app/docs/guides/error-handling): HTTP status codes, error response format, retry strategies
- [Rate Limits](https://signal-stack-ten.vercel.app/docs/guides/rate-limits): Tier limits, burst handling, headers, upgrade paths
- [Trust Scoring](https://signal-stack-ten.vercel.app/docs/guides/trust-scoring): Four dimensions (source authority, cross-reference, recency, LLM analysis), thresholds
- [Webhooks](https://signal-stack-ten.vercel.app/docs/guides/webhooks): Setup, payload format, HMAC verification, retry logic

### API Reference
- [API Reference](https://signal-stack-ten.vercel.app/docs/api-reference): Base URL, authentication, common formats
- [Verify Business](https://signal-stack-ten.vercel.app/docs/api-reference/verify-business): POST /api/v1/verify/business
- [Verify Document](https://signal-stack-ten.vercel.app/docs/api-reference/verify-document): POST /api/v1/verify/document
- [Verify Media](https://signal-stack-ten.vercel.app/docs/api-reference/verify-media): POST /api/v1/verify/media
- [Verify Claim](https://signal-stack-ten.vercel.app/docs/api-reference/verify-claim): POST /api/v1/verify/claim
- [Errors](https://signal-stack-ten.vercel.app/docs/api-reference/errors): Error code reference, validation details, idempotency

### SDKs
- [SDKs Overview](https://signal-stack-ten.vercel.app/docs/sdks): Python, TypeScript, Go, Rust — installation and comparison
- [Python SDK](https://signal-stack-ten.vercel.app/docs/sdks/python): pip install signalstack
- [TypeScript SDK](https://signal-stack-ten.vercel.app/docs/sdks/typescript): npm install @signalstack/sdk
- [Go SDK](https://signal-stack-ten.vercel.app/docs/sdks/go): go get github.com/signalstack/sdk-go
- [Rust SDK](https://signal-stack-ten.vercel.app/docs/sdks/rust): cargo add signalstack

### Agent SDK
- [Agent SDK Overview](https://signal-stack-ten.vercel.app/docs/agent-sdk): LangChain, CrewAI, AutoGen integrations
- [LangChain](https://signal-stack-ten.vercel.app/docs/agent-sdk/langchain): SignalStackTool and SignalStackToolkit for LangChain
- [CrewAI](https://signal-stack-ten.vercel.app/docs/agent-sdk/crewai): SignalStackTool for CrewAI agents

### Additional
- [CLI](https://signal-stack-ten.vercel.app/docs/cli): Command-line interface for verification workflows
- [MCP Server](https://signal-stack-ten.vercel.app/docs/mcp-server): Model Context Protocol server for AI agent integration
- [Changelog](https://signal-stack-ten.vercel.app/docs/changelog): Full version history and changelog

## Resources
- [State of AI Trust 2026](https://signal-stack-ten.vercel.app/resources/state-of-ai-trust): Annual report on AI trust, verification, and agent reliability

## Legal
- [Privacy Policy](https://signal-stack-ten.vercel.app/privacy)
- [Terms of Service](https://signal-stack-ten.vercel.app/terms)
- [Terms Agreement](https://signal-stack-ten.vercel.app/terms-agreement)
- [Cookie Policy](https://signal-stack-ten.vercel.app/cookies)
- [GDPR Compliance](https://signal-stack-ten.vercel.app/gdpr)
- [Service Level Agreement](https://signal-stack-ten.vercel.app/sla)
- [Acceptable Use Policy](https://signal-stack-ten.vercel.app/acceptable-use)
- [Subprocessors](https://signal-stack-ten.vercel.app/subprocessors)

## Key Topics
- **AI Agent Verification**: Real-time claim, business, document, and media verification for autonomous AI agents
- **Deepfake Detection**: Multi-signal analysis combining metadata forensics, computer vision, and data cross-referencing
- **Trust Scoring**: Calibrated Bayesian confidence scores (0.0–1.0) with evidence chains and per-dimension breakdown
- **Fraud Prevention**: Automated detection of synthetic identities, deepfake invoices, and payment redirection attacks
- **Agent Frameworks**: Native integration with LangChain, CrewAI, AutoGen
- **Compliance**: SOC 2, ISO 27001, GDPR-ready, C2PA provenance, EU AI Act readiness