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.

Give your agents an identity.

SigID handles sign-in for your users and gives their AI agents scoped access, wallets, and spending limits.

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

Manage users and agents together

One account for your apps

People can reuse their SigID account across apps and choose which profile details to share with each one.

Agent spending limits

Set daily and per-transaction limits that SigID checks before authorizing agent payments.

Revocable access

Withdraw an agent’s delegated access when its task is finished or its permissions need to change.

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

Audit history

Review sign-ins, permission changes, payments, and key rotations in a single event log.

Sign in with passkeys

Use your device’s fingerprint reader, face recognition, or PIN instead of a password.

How delegation works

MO Maya authorizes access

>_ atlas-research acts for Maya

cloud api.search.dev checks permissions

Delegated tokens identify the agent and the person who authorized it, so services can check both the caller and its permissions.

Pay for agent operations

Human sign-in is free, with no monthly active user fees.

See pricing

$0for human sign-in and consent
1 creditper agent authentication
Free tierno credit card required

Developer resources

Use these guides and API references to connect an application or an agent.

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

Connect your first application

Create an account to configure sign-in and agent access.

Get started – free Read the docs