{"slug":"best-delegated-oauth-platforms-for-agents-acting-on-behalf-of-users","title":"Best delegated OAuth platforms for agents acting on behalf of users","question":"What are the best delegated OAuth platforms for agents acting on behalf of users in 2026?","verdict":"As of 2026-08-10, ChatGPT, Claude, Gemini and Grok collectively rank Arcade #1 for delegated oauth platforms for agents acting on behalf of users on ModelsAgree by aggregate score. The models' case: Best agent-native security model: just-in-time, tool-level OAuth scopes, tokens hidden from both model and client, strong policy/audit controls, custom providers, and. The models' main caveat: Its runtime-centric approach and smaller turnkey integration catalog make it excessive for teams wanting only a lightweight OAuth broker. The strongest alternative is Composio — Excellent developer value across 1,400+ toolkits, with user-scoped sessions, in-chat authorization, managed or bring-your-own OAuth apps, automatic. Not unanimous: Claude picks Auth0; Gemini picks Nango. Source: https://modelsagree.com/best/best-delegated-oauth-platforms-for-agents-acting-on-behalf-of-users (modelsagree.com, CC BY 4.0).","category":"Agents","url":"https://modelsagree.com/best/best-delegated-oauth-platforms-for-agents-acting-on-behalf-of-users","updated":"2026-08-10","models":["ChatGPT","Claude","Gemini","Grok"],"consensus":"2 of 4 models rank Arcade the top pick","disagreement":"Claude picks Auth0; Gemini picks Nango","combined":[{"rank":1,"product":"Arcade","domain":"arcade.dev","score":17,"appearances":4,"modelRanks":{"ChatGPT":1,"Claude":2,"Gemini":3,"Grok":1},"reason":"Best agent-native security model: just-in-time, tool-level OAuth scopes, tokens hidden from both model and client, strong policy/audit controls, custom providers, and cloud or self-hosted deployment; ranked first assuming least-privilege execution matters more than maximum connector count"},{"rank":2,"product":"Composio","domain":"composio.dev","score":14,"appearances":4,"modelRanks":{"ChatGPT":2,"Claude":4,"Gemini":2,"Grok":2},"reason":"Excellent developer value across 1,400+ toolkits, with user-scoped sessions, in-chat authorization, managed or bring-your-own OAuth apps, automatic refresh and revocation, authenticated proxy execution, and broad framework support; a near-tie with Pipedream, winning on agent-native ergonomics"},{"rank":3,"product":"Nango","domain":"nango.dev","score":11,"appearances":4,"modelRanks":{"ChatGPT":4,"Claude":5,"Gemini":1,"Grok":3},"reason":"Offers open-source self-hosting and managed cloud options with hundreds of pre-built OAuth integrations, direct developer control over token vaults, custom sync scripts, and automatic refresh token management without locking teams into proprietary runtimes. (Near-tie with Composio; ranked first on the assumption that practitioners prioritize open-source self-hostability, raw token access, and broad API coverage over opinionated agent wrappers.)"},{"rank":4,"product":"Auth0","domain":"auth0.com","score":9,"appearances":4,"modelRanks":{"ChatGPT":5,"Claude":1,"Gemini":5,"Grok":4},"reason":"The most complete delegated-token story for outbound agent calls — a managed Token Vault that stores and refreshes per-user third-party OAuth tokens, plus standards-based async human-in-the-loop approval (CIBA) and fine-grained authorization (FGA/RAR) so an agent can pause and get user consent mid-execution; backed by Okta's enterprise identity depth, audit, and compliance. Assumes the practitioner values standards and security posture over raw integration count."},{"rank":5,"product":"Descope","domain":"descope.com","score":3,"appearances":1,"modelRanks":{"Claude":3},"reason":"Covers both sides of agent identity — inbound (authenticating agents/MCP into your app) and outbound (vaulted delegated tokens for third-party APIs) — with visual auth flows and strong MCP support, giving a coherent single-vendor path for teams building agentic products."},{"rank":6,"product":"Pipedream Connect","domain":"pipedream.com","score":3,"appearances":1,"modelRanks":{"ChatGPT":3},"reason":"The strongest breadth-first option: managed authentication for roughly 3,000 APIs, many approved OAuth clients, 10,000+ ready actions, MCP support, user/environment isolation, custom API proxying, and mature workflow infrastructure; nearly tied with Composio and better when integration coverage dominates"},{"rank":7,"product":"Stytch","domain":"stytch.com","score":2,"appearances":1,"modelRanks":{"Gemini":4},"reason":"Provides developer-first identity with Connected Apps and OAuth token vaulting, offering clean end-user consent flows, automatic token refresh, and reliable session isolation across web and agent interactions."},{"rank":8,"product":"WorkOS","domain":"workos.com","score":1,"appearances":1,"modelRanks":{"Grok":5},"reason":"Pipes delivers managed OAuth connections with a token-proxy mode that keeps credentials out of agent environments plus session-scoped MCP access, while AuthKit acts as a standards-compliant OAuth authorization server supporting agent registration and OBO-style flows"}],"perModel":{"ChatGPT":[{"rank":1,"product":"Arcade","reason":"Best agent-native security model: just-in-time, tool-level OAuth scopes, tokens hidden from both model and client, strong policy/audit controls, custom providers, and cloud or self-hosted deployment; ranked first assuming least-privilege execution matters more than maximum connector count","fix":"Its runtime-centric approach and smaller turnkey integration catalog make it excessive for teams wanting only a lightweight OAuth broker"},{"rank":2,"product":"Composio","reason":"Excellent developer value across 1,400+ toolkits, with user-scoped sessions, in-chat authorization, managed or bring-your-own OAuth apps, automatic refresh and revocation, authenticated proxy execution, and broad framework support; a near-tie with Pipedream, winning on agent-native ergonomics","fix":"Catalog depth and managed-auth quality vary, and serious production deployments often need custom OAuth apps for branding, scopes, quotas, and tighter control"},{"rank":3,"product":"Pipedream Connect","reason":"The strongest breadth-first option: managed authentication for roughly 3,000 APIs, many approved OAuth clients, 10,000+ ready actions, MCP support, user/environment isolation, custom API proxying, and mature workflow infrastructure; nearly tied with Composio and better when integration coverage dominates","fix":"It provides less agent-specific, per-action authorization governance, and its shared OAuth clients may request broader scopes than a narrowly configured custom client"},{"rank":4,"product":"Nango","reason":"Best auth-focused and self-hostable foundation, with 900+ API definitions, multi-tenant connection handling, automatic refresh and failure detection, scoped API keys, credential-injecting proxy, strong observability, and unusually transparent pricing; especially strong when practitioners build their own tools","fix":"It leaves tool semantics, action approval, and agent policy enforcement largely to the application, while full self-hosted functionality requires an enterprise license and substantial infrastructure"},{"rank":5,"product":"Auth0","reason":"Strongest fit for teams already using Auth0: hardened token custody, automatic refresh, scoped token exchange, established IAM controls, and a clean way for agents to call downstream APIs without receiving raw long-lived credentials","fix":"Its prebuilt external-service coverage and execution layer are much narrower than specialist agent-integration platforms, making it poor value as a standalone cross-SaaS agent stack"}],"Claude":[{"rank":1,"product":"Auth0","reason":"The most complete delegated-token story for outbound agent calls — a managed Token Vault that stores and refreshes per-user third-party OAuth tokens, plus standards-based async human-in-the-loop approval (CIBA) and fine-grained authorization (FGA/RAR) so an agent can pause and get user consent mid-execution; backed by Okta's enterprise identity depth, audit, and compliance. Assumes the practitioner values standards and security posture over raw integration count.","fix":"Heaviest to adopt and priciest at scale; pulls you toward the Auth0/Okta ecosystem and is overkill for a solo dev wiring up a handful of tools."},{"rank":2,"product":"Arcade","reason":"Purpose-built for exactly this problem — agents calling tools with per-user OAuth, with a token vault and auth flows that trigger during agent execution rather than only at login; clean SDKs and framework hooks (LangChain, etc.) make \"let the agent act as this specific user\" a few lines of code.","fix":"Younger and smaller than the incumbents, with a thinner prebuilt tool catalog than Composio and far less enterprise identity/compliance surface than Auth0/Okta."},{"rank":3,"product":"Descope","reason":"Covers both sides of agent identity — inbound (authenticating agents/MCP into your app) and outbound (vaulted delegated tokens for third-party APIs) — with visual auth flows and strong MCP support, giving a coherent single-vendor path for teams building agentic products.","fix":"Less mature outbound tooling and smaller mindshare than the leaders; you're betting on a platform still consolidating its agent feature set."},{"rank":4,"product":"Composio","reason":"Largest managed catalog (250+ tools) with per-user OAuth handled for you, so the practitioner who mainly needs breadth — Gmail, Slack, GitHub, Notion, etc. acting as the end user — gets the shortest path to many integrations.","fix":"It's an integration-platform first, security/identity second; token custody and governance are features rather than a hardened identity posture, which matters for regulated/enterprise use."},{"rank":5,"product":"Nango","reason":"The strongest open-source option — self-hostable managed OAuth with token refresh, per-connection credentials, and 400+ providers; the right pick when you need to own the data plane, avoid vendor lock-in, or keep tokens on your own infra.","fix":"It's integration/OAuth infrastructure, not an agent-native identity layer — no built-in agent authorization, human-in-the-loop consent, or fine-grained delegation; you build the agent-facing logic yourself."}],"Gemini":[{"rank":1,"product":"Nango","reason":"Offers open-source self-hosting and managed cloud options with hundreds of pre-built OAuth integrations, direct developer control over token vaults, custom sync scripts, and automatic refresh token management without locking teams into proprietary runtimes. (Near-tie with Composio; ranked first on the assumption that practitioners prioritize open-source self-hostability, raw token access, and broad API coverage over opinionated agent wrappers.)","fix":"Lacks built-in agent runtime execution guardrails, prompt injection safety gates, or native MCP authorization policies, so it is not for teams wanting a turnkey, security-governed agent action sandbox out of the box."},{"rank":2,"product":"Composio","reason":"Delivers an end-to-end managed platform pairing per-user OAuth authentication with 250+ pre-built agent toolkits, seamless framework integrations (LangChain, CrewAI), and automated token lifecycle orchestration. (Near-tie with Nango; ranked second because it is a closed managed service rather than open source.)","fix":"Dependent on Composio's managed cloud infrastructure and tool schemas, making it unsuitable for organizations needing self-hosted compliance, VPC isolation, or direct raw token extraction."},{"rank":3,"product":"Arcade","reason":"Purpose-built for agentic security using MCP-native architecture, RFC 8693 token exchange, and just-in-time user authorization loops that prevent confused-deputy vulnerabilities during autonomous execution. (Assumption: Security-conscious enterprise teams prioritize strict policy enforcement over sheer integration count.)","fix":"Has a smaller catalog of out-of-the-box integrations than general auth providers, making it not for developers who want plug-and-play connections to hundreds of niche long-tail APIs without custom tool wrapping."},{"rank":4,"product":"Stytch","reason":"Provides developer-first identity with Connected Apps and OAuth token vaulting, offering clean end-user consent flows, automatic token refresh, and reliable session isolation across web and agent interactions.","fix":"Focuses purely on identity and token vaulting rather than agent tool orchestration or MCP runtime execution, meaning it is not for teams seeking built-in tool registries or agent-level policy gates."},{"rank":5,"product":"Auth0","reason":"Enterprise-grade compliance (SOC 2, ISO, HIPAA) and robust implementation of standard OAuth 2.0 Token Exchange (RFC 8693) and Fine-Grained Authorization (FGA) for large enterprise identity stacks.","fix":"High cost, configuration complexity, and lack of agent-tailored SDKs or pre-built tool integration catalogs mean it is not for fast-moving startups wanting simple developer ergonomics."}],"Grok":[{"rank":1,"product":"Arcade","reason":"Runtime-enforced two-identity (user + agent) delegated context with per-action permission intersection before tool calls, secure per-user OAuth token vault + auto-refresh that keeps credentials entirely out of LLM reach by hosting execution, just-in-time consent, MCP gateways, and OTel audit; assumption that production multi-user agents need call-time authorization over pure connector count","fix":"Narrower first-party integration catalog and opinionated execution model make it less suitable if you only need credential access without adopting its runtime"},{"rank":2,"product":"Composio","reason":"Broadest practical toolkit catalog with managed per-user OAuth isolation, automatic token lifecycle, framework SDKs, and native MCP support that lets most practitioners ship secure delegated tool-calling agents quickly","fix":"Weaker runtime policy intersection and standardized audit export than purpose-built action runtimes; not the strongest choice for strict enterprise governance of every action"},{"rank":3,"product":"Nango","reason":"Open-source, fully self-hostable or BYOC credential layer covering 900+ APIs with complete OAuth/API-key lifecycle, server-side injection so tokens never leave the vault, white-label flows, and request-level OTel audit","fix":"More infrastructure than agent-native runtime; teams must implement their own per-action authorization and tool-safety policies on top"},{"rank":4,"product":"Auth0","reason":"Mature Token Vault built on OAuth token exchange (RFC 8693) for secure delegated access, Agent as Principal for first-class agent identities with lifecycle and audit, plus enterprise-grade OIDC compliance and IdP trust","fix":"Limited pre-built external OAuth providers in the vault and no native tool-execution runtime, so teams still own the agent-side orchestration"},{"rank":5,"product":"WorkOS","reason":"Pipes delivers managed OAuth connections with a token-proxy mode that keeps credentials out of agent environments plus session-scoped MCP access, while AuthKit acts as a standards-compliant OAuth authorization server supporting agent registration and OBO-style flows","fix":"Primarily an identity + connection layer rather than a full agent auth runtime or large tool catalog, requiring more custom work for execution and policy"}]},"missedByModel":{"ChatGPT":[{"product":"Scalekit Agent Actions","reason":"promising tenant-aware delegated OAuth and packaged actions, but newer and materially narrower than the leaders"},{"product":"Microsoft Entra Agent ID","reason":"excellent governed on-behalf-of access inside Microsoft 365 and Azure, but too ecosystem-specific for a general cross-SaaS ranking"}],"Claude":[{"product":"Stytch Connected Apps","reason":"excellent as an OAuth authorization server and MCP-native inbound auth — your app as the IdP — but leans inbound rather than vaulting third-party tokens for outbound delegated calls"},{"product":"WorkOS AuthKit + Connect","reason":"great B2B auth and SSO with growing agent/MCP support, but delegated outbound token custody isn't its core strength yet"}],"Gemini":[{"product":"Descope","reason":"strong CIAM with visual workflow orchestration and agent identity hubs, but lacks pre-packaged tool execution catalogs and agent-native tool registries"},{"product":"Keycloak","reason":"battle-tested open-source IAM supporting OAuth token exchange, but requires heavy custom implementation to build multi-tenant agent token vaulting and dynamic tool consent"}],"Grok":[{"product":"Merge","reason":"strong governed enterprise connectors and Agent Handler but less optimized for dynamic per-action agent tool-calling"},{"product":"Stytch","reason":"solid Connected Apps for agent consent and token management but narrower coverage and traction than the top five"}]}}