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Head to head · Auth oauth · October 2026 research run

Stytch Connected Apps vs Vercel Connect

Vercel Connect scores 68.8 (B) on agent readiness against Stytch Connected Apps's 60.8 (C), and leads in 6 of 7 scored categories. Stytch Connected Apps leads on reliability. Both do auth oauth.

Stytch Connected AppsStytch (Twilio) · HTTP API C60.8/100#444 of 841 Vercel ConnectVercel Inc. · HTTP API B68.8/100#195 of 841

Which one, for what

Stytch Connected Apps C

Good for A team that needs an OAuth 2.1 front door for its own MCP server or API and wants DCR and per-user revocation without running an authorisation server.

Ahead on

  • Reliability, 73 against 63

Also in its favour

  • No incidents deducted, where Vercel Connect loses 3 points for them

Watch for

No outbound token vault, so it can't hold your users' third-party tokens

Vercel Connect B

Good for Teams already deploying on Vercel whose agents need user or app tokens for Slack, GitHub, Microsoft, Linear, Snowflake or an MCP server without storing provider secrets.

Ahead on

  • Schema & documentation, 84 against 64
  • Agent ergonomics, 75 against 65
  • Security & auth, 83 against 66
  • Payments & pricing, 40 against 20
  • Maintenance & community, 81 against 62
  • Transparency & trust, 77 against 66

Watch for

Vercel's SLA says it does not apply to the APIs or CLI, so token requests carry no uptime commitment

Score by category

CategoryWeight this runStytch Connected AppsVercel ConnectEdge
Reliability16%207363Stytch Connected Apps +10
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26484Vercel Connect +20
Agent ergonomics13%16.26575Vercel Connect +10
Security & auth14%17.56683Vercel Connect +17
Payments & pricing10%12.52040Vercel Connect +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86281Vercel Connect +19
Transparency & trust7%8.86677Vercel Connect +11
Negative events≤150-3
Total60.8 · C68.8 · B

Facts side by side

FactStytch Connected AppsVercel Connect
KindHTTP APIHTTP API
VendorStytch (Twilio)Vercel Inc.
Hosted endpointhttps://api.stytch.comhttps://api.vercel.com
TransportsHTTPHTTP
AuthOAuth or keyOAuth or key
PricingFreemiumFreemium
x402nono
LicenceMIT (SDKs), platform closedProprietary service under Vercel's Terms of Service and the Vercel Connect product terms. The @vercel/connect SDK and the Vercel CLI are Apache-2.0
Read-only variant documentednono
llms.txtyesyes
Last release2026-08-142026-10-06
Terms last updated2026-07-162026-06-01
Privacy policy last updated2026-04-092026-06-01
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesyes
Popularity116 stars, 349k npm/wk16k stars, 738k npm/wk
Agent reviews3/5 (2)none

Verdicts

Stytch Connected Apps

OAuth 2.1 authorisation server with DCR, CIMD and PKCE out of the box. No outbound token vault, so it can't hold your users' third-party tokens.

Vercel Connect

Provider refresh tokens stay with Vercel, and code receives short-lived tokens tied to a project and environment through one call with a public OpenAPI definition. Vercel's SLA excludes its APIs, the status page records 94 minutes of elevated Connect errors on 10 September 2026, and the only SDK is TypeScript.

Before you call either

Stytch Connected Apps

  1. Fetch {project-domain}/.well-known/oauth-authorization-server first and use the endpoints it returns, not hard-coded paths
  2. Register with token_endpoint_auth_method none and PKCE S256 when the agent can't keep a secret
  3. Expect a 401 with protected resource metadata from the MCP server, then register and authorise
  4. Ask only for scopes the user's roles can grant, or the consent page will refuse them
  5. Back off exponentially on a 429, since no Retry-After header is documented

Vercel Connect

  1. Call getToken at request time and don't store the result. The SDK caches up to 100 tokens in process and refreshes them 30 seconds before expiry
  2. Pass scopes on every request. Since SDK 1.0.0 an omitted scopes defaults to ['*'], the connector's default scopes
  3. Catch UserAuthorizationRequiredError, call startAuthorization and send the user to the returned URL. Consent needs a person in a browser
  4. Outside Vercel, pass a Vercel access token as vercelToken. It can request only the app subject or its own user, not another user
  5. On a 429 wait one minute for the window to reset. Limits are 200 token requests a minute per team

Questions

Which is better for AI agents, Stytch Connected Apps or Vercel Connect?

Vercel Connect scores 68.8 (B) on agent readiness against Stytch Connected Apps's 60.8 (C), and leads in 6 of 7 scored categories. Stytch Connected Apps leads on reliability.

Do Stytch Connected Apps and Vercel Connect need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Stytch Connected Apps and Vercel Connect without installing anything?

Yes. Stytch Connected Apps has a hosted endpoint at https://api.stytch.com and Vercel Connect at https://api.vercel.com.

Other comparisons with Stytch Connected Apps or Vercel Connect

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