# Newoldstamp

> Newoldstamp is an email signature management platform that lets companies create, brand, and centrally manage professional email signatures across teams, with signature marketing banners/campaigns, click analytics, and deployment to Google Workspace and Microsoft 365. Founded 2016; a wholly-owned subsidiary of Blackpearl Group since 2025. It also operates Pearl Diver, a website-visitor identification product.

## Contract
- Newoldstamp's application backend is a GraphQL API at https://newoldstamp.com/api/graphql (41 queries, 71 mutations, 4 subscriptions). Introspection is anonymous-open. There is no documented public developer program, no API-key portal, and no OpenAPI. Treat this as an undocumented application API.

## Specs
- GraphQL SDL: graphql/newoldstamp.graphql
- GraphQL introspection: graphql/newoldstamp-introspection.json

## Artifacts
- Authentication (bearer / signIn): authentication/newoldstamp-authentication.yml
- API conventions (Relay pagination, error envelope): conventions/newoldstamp-conventions.yml
- Data model / ERD: data-model/newoldstamp-data-model.yml
- MCP candidate tools: mcp/newoldstamp-mcp.yml
- Plans & pricing: plans/newoldstamp-plans-pricing.yml
- Rate limits (undocumented): rate-limits/newoldstamp-rate-limits.yml
- Domain security probe: security/newoldstamp-domain-security.yml
- Well-known probe: well-known/newoldstamp-well-known.yml

## Docs
- Website: https://newoldstamp.com
- Features: https://newoldstamp.com/features/
- Pricing: https://newoldstamp.com/pricing/
- Help center: https://support.newoldstamp.com/en/
- Blog: https://newoldstamp.com/blog/
- Sign up: https://app.newoldstamp.com/sign-up
- Sign in: https://app.newoldstamp.com/sign-in
- Terms: https://newoldstamp.com/terms-of-use/
- Privacy: https://newoldstamp.com/privacy/