Does SigID charge by monthly active users (MAU)?

No. SigID does not bill by user count. Human login, passkey login, wallet sign-in, consent views, OIDC discovery, JWKS reads, and token revocation are free.

What are Auth Credits?

Auth Credits meter higher-value identity operations such as AI agent authentication, token exchange, delegated access, introspection, wallet policy authorization, and signing.

How do I integrate SigID?

Create an application in the SigID dashboard, register exact redirect URIs and scopes, redirect users to hosted auth with Authorization Code and PKCE, exchange the callback code at the discovered token endpoint, then validate SigID tokens on every protected backend route.

How do AI agents authenticate with SigID?

Agents are first-class principals. They register themselves with a key pair and an anchor proof (ERC-8004, did:web, or did:key), authenticate via cryptographic challenge-response, and receive the same standard OAuth 2.1 and OIDC tokens as human users.

identity for the agent economy

Give your agents
an identity.

One sign-in for your users. Identity, wallets, and spending limits for their AI agents.

Get started – free Talk to an expert

Passkeys
Social login
Enterprise SSO
Wallet sign-in
Agent auth
Agent wallets
Credential vault
Egress injection
Spending limits
Audit trail
Passkeys
Social login
Enterprise SSO
Wallet sign-in
Agent auth
Agent wallets
Credential vault
Egress injection
Spending limits
Audit trail

What you get

Sign-in for people. Identity for agents.

One account. Every app.

Users sign in once and choose what each app can see.

Wallets with guardrails

Give agents a budget. Every payment checked, capped, and logged.

You stay in control

See everything agents do. Revoke access in one click.

09:14:02 token issued → atlas-research
09:14:05 x402 paid api.search.dev $0.02
09:14:11 scope granted read:data
09:14:19 passkey sign-in · maya
09:14:24 delegation created · act: maya
09:14:31 budget check ok · $3.40 / $5.00
09:14:40 transfer blocked · over limit
09:14:47 key rotated · ed25519
09:14:02 token issued → atlas-research
09:14:05 x402 paid api.search.dev $0.02
09:14:11 scope granted read:data
09:14:19 passkey sign-in · maya
09:14:24 delegation created · act: maya
09:14:31 budget check ok · $3.40 / $5.00
09:14:40 transfer blocked · over limit
09:14:47 key rotated · ed25519

One audit trail

Every sign-in, grant, payment, and rotation – in one stream.

Phishing-proof sign-in

Passkeys by default. Nothing to steal, nothing to type.

Delegation

Delegated, not unleashed

MO Maya signs in once

>_ atlas-research acts for Maya

cloud api.search.dev paid & audited

Every token says who an agent acts for. Cut the cord any time.

Account: 1; Users sign in once, everywhere
Kinds of principals: 2; People and agents, equally first-class
MAU fees: 0; Human sign-in is free, forever
Audited: 100%; Every login, grant, and payment

Pricing

Free for people. Pay per agent action.

No MAU pricing – human sign-in never costs anything.

See pricing

$0per human sign-in, passkey, or consent
1 creditper agent authentication
Free tierunlimited apps and orgs, no card

Reading this with an agent?

This page is machine-readable too – agents are customers here, not crawlers.

GET /auth.md # SigID agent authentication and delegation recipe
GET /api-policy.md # SigID API errors, rate limits, versioning, and deprecation
POST https://auth.sigid.org/mcp # SigID MCP – public API discovery and documentation over Streamable HTTP
GET https://auth.sigid.org/api/v1/capabilities # public read-only API – enabled SigID capabilities, no credentials needed
GET /openapi.json # SigID Public API – typed operations, OAuth scopes, and error schemas
GET /llms.txt # this site, summarized for language models
GET /llms-full.txt # one-file implementation context for answer engines and coding agents
GET /quickstart.md # shortest integration path for app developers and agents
GET https://auth.sigid.org/.well-known/openid-configuration # OIDC discovery – endpoints, JWKS, supported flows
POST https://auth.sigid.org/api/v1/agents/auth/register # self-registration – bring a key pair and an anchor proof
GET https://docs.sigid.org/ # full documentation: quickstarts, API, and SDK reference

Ready when your agents are.

Start free. No card, no MAU math.

Get started – free Read the docs

Give your agents an identity.