# SigID Overview

SigID is a hosted identity provider for humans and AI agents. It gives product teams one identity plane for hosted login, OAuth 2.1, OpenID Connect, passkeys, MFA, enterprise SSO, SIWE wallet sign-in, agent authentication, delegation, wallet policy, x402 authorization, and audit.

Use SigID when you want users and agents to authenticate through a managed identity service instead of building credential handling, consent, token issuance, key management, and audit inside every application.

## Primary Message

Give your agents an identity.

SigID is one sign-in for users and identity for their AI agents. Humans authenticate with passkeys, passwords, magic links, social login, enterprise SSO, MFA, or wallets. Agents authenticate with cryptographic keys, anchors, challenge-response, and delegated tokens. Both receive standard OAuth/OIDC tokens.

Human sign-in is free. SigID does not meter monthly active users. Auth Credits meter higher-value identity work such as agent authentication, token exchange, delegation, introspection, wallet policy, x402 authorization, and signing.

## Who Uses SigID

- Application developers adding hosted login, OAuth, OIDC, and backend token validation.
- AI product teams that need first-class agent identity and scoped agent access.
- MCP and tool providers that need authenticated tool calls and delegated access.
- Businesses launching tenant environments, applications, domains, SSO, branding, billing, and audit.
- Users managing passkeys, MFA, sessions, connected apps, consent, wallets, vault credentials, delegations, and personal agents.

## Public Surfaces

| Surface | URL | Role |
|---|---|---|
| Public site | `https://www.sigid.org/` | Product discovery, pricing, security, and entry points |
| Documentation | `https://docs.sigid.org/` | Quickstarts, API guides, SDK reference, business rollout, account help |
| Identity | `https://identity.sigid.org/` | User account home, signup, login, passkeys, MFA, sessions, connected apps, personal agents |
| Dashboard | `https://dashboard.sigid.org/` | Organizations, tenant environments, applications, domains, branding, billing, audit |
| Hosted auth | `https://auth.sigid.org/` | OAuth/OIDC authorization, consent, callbacks, discovery, JWKS, token issuance |

## Integration Summary

1. Create a SigID account at `https://identity.sigid.org/`.
2. Open `https://dashboard.sigid.org/`.
3. Create or select an organization and tenant environment.
4. Create an application.
5. Register exact redirect URIs and browser origins.
6. Choose scopes, grant types, token endpoint authentication, login methods, and branding.
7. In your app, redirect to hosted auth using Authorization Code with PKCE.
8. Exchange the authorization code at the token endpoint from OIDC discovery.
9. Validate tokens on the backend before serving protected data.
10. Add agent authentication, delegation, webhooks, wallets, or x402 only when the product workflow needs them.

## Machine-Readable Resources

- `/llms.txt` - short curated index for language models and agents.
- `/llms-full.txt` - longer one-file context for answer engines.
- `/quickstart.md` - shortest integration path.
- `/developers.md` - developer implementation sequence.
- `/agents.md` - agent identity and authentication guide.
- `/answers.md` - concise answer snippets.