The strongest open-source alternatives to Pica (One) for building AI agents — agent auth & tool access ranked by GitHub traction, each with a head-to-head.
Short answer: the closest alternative to Pica (One) is Anon (★ 0), the most-starred agent auth & tool access; Arcade and Auth0 for AI Agents are also strong.
Pica (One) (★ 0) is Agent tooling platform (OneTool) connecting agents to 100+ APIs and 25,000+ actions through a single SDK, with AuthKit for managed auth; community edition is open source. If it is not the right fit, these 15 agent auth & tool access cover the same ground — Anon is the most-starred option below. Or browse the best agent auth & tool access and Pica (One)'s own page.
User-permissioned auth layer that lets agents securely log into and act inside third-party apps that lack APIs (SSO, OAuth, 2FA) without ever storing user credentials. Best for agent builders.
MCP runtime that handles OAuth and authorized tool-calling so AI agents can act on behalf of a specific user across 7,500+ agent-optimized tools. Best for agent builders.
Auth0's identity stack for GenAI: a Token Vault that stores and refreshes third-party OAuth tokens for agents, async (CIBA) human approvals, and fine-grained authorization for RAG. Best for agent builders.
Managed auth plus 1,000+ pre-authenticated toolkits that give AI agents per-user, scoped access to SaaS apps with automatic OAuth/token refresh. Best for agent builders.
Identity platform for AI agents and MCP: turn any app into an OAuth provider (Inbound Apps), vault and refresh third-party tokens, and give each agent a scoped identity. Best for agent builders.
AI-native integration platform with prebuilt connectors, configurable actions/flows and MCP so agents get authenticated, mapped access to your customers' SaaS apps. Best for agent builders.
Hosted, production MCP servers with built-in OAuth and multi-tenant auth across 600+ tools, plus the open-source Strata server for self-hosting. Best for agent builders.
Gives agents secure, authenticated access to thousands of prebuilt tools across 220+ integrations via custom MCP servers, with enterprise governance and normalized data. Best for agent builders.
Open-source integration platform providing OAuth, token refresh and credential storage for 800+ APIs, with each integration exposed to agents over MCP. Best for agent builders.
Unified integration API exposing 1,000+ prebuilt actions across 130+ connectors (plus an MCP server and triggers) so agents can act in CRMs, ticketing, email and messaging. Best for agent builders.
Embedded integration API and managed auth that lets your app or agent connect accounts and run actions across 3,000+ apps on behalf of end users. Best for agent builders.
Modular auth stack for AI apps: puts an OAuth 2.1 authorization server in front of MCP servers, adds delegated agent identity and a token vault, plus enterprise SSO/SCIM. Best for agent builders.
Turns your app into an OAuth 2.1/OIDC provider giving agents and MCP servers scoped, revocable, auditable access with a drop-in consent UI and human-in-the-loop approvals. Best for agent builders.
Cloud tool infrastructure and Agent Studio that equip any LLM with hosted, low-latency tools (code exec, web, RAG, MCP) by wrapping your completion in a few lines. Best for agent builders.
With one config value AuthKit becomes an MCP-compliant OAuth 2.1 authorization server; adds SSO, SCIM, audit logs and fine-grained tool-level authorization for agents. Best for agent builders.
Anon (★ 0) is the most-starred agent auth & tool access alternative to Pica (One). User-permissioned auth layer that lets agents securely log into and act inside third-party apps that lack APIs (SSO, OAuth, 2FA) without ever storing user credentials.
The strongest agent auth & tool access alternatives to Pica (One) are Anon, Arcade, Auth0 for AI Agents, Composio and more — each with a head-to-head comparison.
Yes — the alternatives listed are open source and free to self-host; you bring your own model keys.
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