Xpersona

Crawler Summary

mcp-handler answer-first brief

Vercel MCP Adapter for Next.js and other frameworks mcp-handler A Vercel adapter for the Model Context Protocol (MCP), enabling real-time communication between your applications and AI models. Supports Next.js and Nuxt. Installation **Note**: Versions of @modelcontextprotocol/sdk prior to 1.25.1 have a security vulnerability. Use version 1.25.2 or later. Quick Start (Next.js) Connecting Clients If your client supports Streamable HTTP, connect directly: For stdio-only Published capability contract available. No trust telemetry is available yet. 564 GitHub stars reported by the source. Last updated 2/24/2026.

Freshness

Last checked 2/22/2026

Best For

Contract is available with explicit auth and schema references.

Not Ideal For

mcp-handler is not ideal for teams that need stronger public trust telemetry, lower setup complexity, or more explicit contract coverage before production rollout.

Evidence Sources Checked

editorial-content, capability-contract, runtime-metrics, public facts pack

CardFactsSnapshotContractTrust
Claim this agent
Agent DossierGitHubSafety: 100/100

mcp-handler

Vercel MCP Adapter for Next.js and other frameworks mcp-handler A Vercel adapter for the Model Context Protocol (MCP), enabling real-time communication between your applications and AI models. Supports Next.js and Nuxt. Installation **Note**: Versions of @modelcontextprotocol/sdk prior to 1.25.1 have a security vulnerability. Use version 1.25.2 or later. Quick Start (Next.js) Connecting Clients If your client supports Streamable HTTP, connect directly: For stdio-only

MCPverified

Public facts

7

Change events

1

Artifacts

0

Freshness

Feb 22, 2026

Verifiededitorial-content1 verified compatibility signal564 GitHub stars

Published capability contract available. No trust telemetry is available yet. 564 GitHub stars reported by the source. Last updated 2/24/2026.

564 GitHub starsSchema refs publishedTrust evidence available

Trust score

Unknown

Compatibility

MCP

Freshness

Feb 22, 2026

Vendor

Vercel

Artifacts

0

Benchmarks

0

Last release

1.0.7

Executive Summary

Key links, install path, and a quick operational read before the deeper crawl record.

Verifiededitorial-content

Summary

Published capability contract available. No trust telemetry is available yet. 564 GitHub stars reported by the source. Last updated 2/24/2026.

View Source

Setup snapshot

git clone https://github.com/vercel/mcp-handler.git
  1. 1

    Setup complexity is MEDIUM. Standard integration tests and API key provisioning are required before connecting this to production workloads.

  2. 2

    Final validation: Expose the agent to a mock request payload inside a sandbox and trace the network egress before allowing access to real customer data.

Evidence Ledger

Everything public we have scraped or crawled about this agent, grouped by evidence type with provenance.

Verifiededitorial-content
Vendor (1)

Vendor

Vercel

profilemedium
Observed Feb 24, 2026Source linkProvenance
Compatibility (2)

Protocol compatibility

MCP

contracthigh
Observed Feb 24, 2026Source linkProvenance

Auth modes

mcp, api_key, oauth

contracthigh
Observed Feb 24, 2026Source linkProvenance
Artifact (1)

Machine-readable schemas

OpenAPI or schema references published

contracthigh
Observed Feb 24, 2026Source linkProvenance
Adoption (1)

Adoption signal

564 GitHub stars

profilemedium
Observed Feb 24, 2026Source linkProvenance
Security (1)

Handshake status

UNKNOWN

trustmedium
Observed unknownSource linkProvenance
Integration (1)

Crawlable docs

6 indexed pages on the official domain

search_documentmedium
Observed Apr 15, 2026Source linkProvenance

Release & Crawl Timeline

Merged public release, docs, artifact, benchmark, pricing, and trust refresh events.

Self-declaredagent-index

Docs Update

Docs refreshed: Sign in to GitHub · GitHub

search_documentmedium

Fresh crawlable documentation was indexed for the official domain.

Observed Apr 15, 2026

Artifacts Archive

Extracted files, examples, snippets, parameters, dependencies, permissions, and artifact metadata.

Self-declaredGITHUB MCP

Extracted files

0

Examples

4

Snippets

0

Languages

typescript

Executable Examples

bash

npm install mcp-handler @modelcontextprotocol/[email protected] zod@^3

typescript

// app/api/[transport]/route.ts
import { createMcpHandler } from "mcp-handler";
import { z } from "zod";

const handler = createMcpHandler(
  (server) => {
    server.registerTool(
      "roll_dice",
      {
        title: "Roll Dice",
        description: "Roll a dice with a specified number of sides.",
        inputSchema: {
          sides: z.number().int().min(2),
        },
      },
      async ({ sides }) => {
        const value = 1 + Math.floor(Math.random() * sides);
        return {
          content: [{ type: "text", text: `🎲 You rolled a ${value}!` }],
        };
      }
    );
  },
  {},
  {
    basePath: "/api", // must match where [transport] is located
    maxDuration: 60,
    verboseLogs: true,
  }
);

export { handler as GET, handler as POST };

json

{
  "remote-example": {
    "url": "http://localhost:3000/api/mcp"
  }
}

json

{
  "remote-example": {
    "command": "npx",
    "args": ["-y", "mcp-remote", "http://localhost:3000/api/mcp"]
  }
}

Docs & README

Full documentation captured from public sources, including the complete README when available.

Self-declaredGITHUB MCP

Docs source

GITHUB MCP

Editorial quality

ready

Vercel MCP Adapter for Next.js and other frameworks mcp-handler A Vercel adapter for the Model Context Protocol (MCP), enabling real-time communication between your applications and AI models. Supports Next.js and Nuxt. Installation **Note**: Versions of @modelcontextprotocol/sdk prior to 1.25.1 have a security vulnerability. Use version 1.25.2 or later. Quick Start (Next.js) Connecting Clients If your client supports Streamable HTTP, connect directly: For stdio-only

Full README

mcp-handler

A Vercel adapter for the Model Context Protocol (MCP), enabling real-time communication between your applications and AI models. Supports Next.js and Nuxt.

Installation

npm install mcp-handler @modelcontextprotocol/[email protected] zod@^3

Note: Versions of @modelcontextprotocol/sdk prior to 1.25.1 have a security vulnerability. Use version 1.25.2 or later.

Quick Start (Next.js)

// app/api/[transport]/route.ts
import { createMcpHandler } from "mcp-handler";
import { z } from "zod";

const handler = createMcpHandler(
  (server) => {
    server.registerTool(
      "roll_dice",
      {
        title: "Roll Dice",
        description: "Roll a dice with a specified number of sides.",
        inputSchema: {
          sides: z.number().int().min(2),
        },
      },
      async ({ sides }) => {
        const value = 1 + Math.floor(Math.random() * sides);
        return {
          content: [{ type: "text", text: `🎲 You rolled a ${value}!` }],
        };
      }
    );
  },
  {},
  {
    basePath: "/api", // must match where [transport] is located
    maxDuration: 60,
    verboseLogs: true,
  }
);

export { handler as GET, handler as POST };

Connecting Clients

If your client supports Streamable HTTP, connect directly:

{
  "remote-example": {
    "url": "http://localhost:3000/api/mcp"
  }
}

For stdio-only clients, use mcp-remote:

{
  "remote-example": {
    "command": "npx",
    "args": ["-y", "mcp-remote", "http://localhost:3000/api/mcp"]
  }
}

Documentation

Features

  • Framework Support: Next.js and Nuxt
  • Multiple Transports: Streamable HTTP and Server-Sent Events (SSE)
  • Redis Integration: Optional, for SSE transport resumability
  • TypeScript Support: Full type definitions included

Requirements

  • Next.js 13+ or Nuxt 3+
  • Node.js 18+
  • Redis (optional, for SSE)

License

Apache-2.0

Contract & API

Machine endpoints, protocol fit, contract coverage, invocation examples, and guardrails for agent-to-agent use.

Verifiedcapability-contract

Endpoints

Dossier APISnapshot APIContract APITrust API

Contract coverage

Status

ready

Auth

mcp, api_key, oauth

Streaming

Yes

Data region

global

Protocol support

MCP: verified

Requires: mcp, lang:typescript, streaming

Forbidden: none

Guardrails

Operational confidence: medium

Contract is available with explicit auth and schema references.
Trust confidence is not low and verification freshness is acceptable.
Protocol support is explicitly confirmed in contract metadata.
Invocation examples
curl -s "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/snapshot"
curl -s "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract"
curl -s "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/trust"

Reliability & Benchmarks

Trust and runtime signals, benchmark suites, failure patterns, and practical risk constraints.

Missingruntime-metrics

Trust signals

Handshake

UNKNOWN

Confidence

unknown

Attempts 30d

unknown

Fallback rate

unknown

Runtime metrics

Observed P50

unknown

Observed P95

unknown

Rate limit

unknown

Estimated cost

unknown

No benchmark suites or observed failure patterns are available.

Media & Demo

Every public screenshot, visual asset, demo link, and owner-provided destination tied to this agent.

Missingno-media
No screenshots, media assets, or demo links are available.

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Machine Appendix

Contract JSON

{
  "contractStatus": "ready",
  "authModes": [
    "mcp",
    "api_key",
    "oauth"
  ],
  "requires": [
    "mcp",
    "lang:typescript",
    "streaming"
  ],
  "forbidden": [],
  "supportsMcp": true,
  "supportsA2a": false,
  "supportsStreaming": true,
  "inputSchemaRef": "https://github.com/vercel/mcp-handler#input",
  "outputSchemaRef": "https://github.com/vercel/mcp-handler#output",
  "dataRegion": "global",
  "contractUpdatedAt": "2026-02-24T19:46:03.401Z",
  "sourceUpdatedAt": "2026-02-24T19:46:03.401Z",
  "freshnessSeconds": 19608772
}

Invocation Guide

{
  "preferredApi": {
    "snapshotUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/snapshot",
    "contractUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "trustUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/trust"
  },
  "curlExamples": [
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/snapshot\"",
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract\"",
    "curl -s \"https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/trust\""
  ],
  "jsonRequestTemplate": {
    "query": "summarize this repo",
    "constraints": {
      "maxLatencyMs": 2000,
      "protocolPreference": [
        "MCP"
      ]
    }
  },
  "jsonResponseTemplate": {
    "ok": true,
    "result": {
      "summary": "...",
      "confidence": 0.9
    },
    "meta": {
      "source": "GITHUB_MCP",
      "generatedAt": "2026-10-09T18:38:55.699Z"
    }
  },
  "retryPolicy": {
    "maxAttempts": 3,
    "backoffMs": [
      500,
      1500,
      3500
    ],
    "retryableConditions": [
      "HTTP_429",
      "HTTP_503",
      "NETWORK_TIMEOUT"
    ]
  }
}

Trust JSON

{
  "status": "unavailable",
  "handshakeStatus": "UNKNOWN",
  "verificationFreshnessHours": null,
  "reputationScore": null,
  "p95LatencyMs": null,
  "successRate30d": null,
  "fallbackRate": null,
  "attempts30d": null,
  "trustUpdatedAt": null,
  "trustConfidence": "unknown",
  "sourceUpdatedAt": null,
  "freshnessSeconds": null
}

Capability Matrix

{
  "rows": [
    {
      "key": "MCP",
      "type": "protocol",
      "support": "supported",
      "confidenceSource": "contract",
      "notes": "Confirmed by capability contract"
    },
    {
      "key": "mcp",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    },
    {
      "key": "vercel",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    },
    {
      "key": "next.js",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    },
    {
      "key": "ai",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    },
    {
      "key": "cli",
      "type": "capability",
      "support": "supported",
      "confidenceSource": "profile",
      "notes": "Declared in agent profile metadata"
    }
  ],
  "flattenedTokens": "protocol:MCP|supported|contract capability:mcp|supported|profile capability:vercel|supported|profile capability:next.js|supported|profile capability:ai|supported|profile capability:cli|supported|profile"
}

Facts JSON

[
  {
    "factKey": "docs_crawl",
    "category": "integration",
    "label": "Crawlable docs",
    "value": "6 indexed pages on the official domain",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  },
  {
    "factKey": "protocols",
    "category": "compatibility",
    "label": "Protocol compatibility",
    "value": "MCP",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:46:03.401Z",
    "isPublic": true
  },
  {
    "factKey": "auth_modes",
    "category": "compatibility",
    "label": "Auth modes",
    "value": "mcp, api_key, oauth",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:46:03.401Z",
    "isPublic": true
  },
  {
    "factKey": "schema_refs",
    "category": "artifact",
    "label": "Machine-readable schemas",
    "value": "OpenAPI or schema references published",
    "href": "https://github.com/vercel/mcp-handler#input",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/contract",
    "sourceType": "contract",
    "confidence": "high",
    "observedAt": "2026-02-24T19:46:03.401Z",
    "isPublic": true
  },
  {
    "factKey": "vendor",
    "category": "vendor",
    "label": "Vendor",
    "value": "Vercel",
    "href": "https://github.com/vercel/mcp-handler",
    "sourceUrl": "https://github.com/vercel/mcp-handler",
    "sourceType": "profile",
    "confidence": "medium",
    "observedAt": "2026-02-24T19:43:14.176Z",
    "isPublic": true
  },
  {
    "factKey": "traction",
    "category": "adoption",
    "label": "Adoption signal",
    "value": "564 GitHub stars",
    "href": "https://github.com/vercel/mcp-handler",
    "sourceUrl": "https://github.com/vercel/mcp-handler",
    "sourceType": "profile",
    "confidence": "medium",
    "observedAt": "2026-02-24T19:43:14.176Z",
    "isPublic": true
  },
  {
    "factKey": "handshake_status",
    "category": "security",
    "label": "Handshake status",
    "value": "UNKNOWN",
    "href": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/trust",
    "sourceUrl": "https://www.xpersona.co/api/v1/agents/mcp-vercel-mcp-handler/trust",
    "sourceType": "trust",
    "confidence": "medium",
    "observedAt": null,
    "isPublic": true
  }
]

Change Events JSON

[
  {
    "eventType": "docs_update",
    "title": "Docs refreshed: Sign in to GitHub · GitHub",
    "description": "Fresh crawlable documentation was indexed for the official domain.",
    "href": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceUrl": "https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fopenclaw%2Fskills%2Ftree%2Fmain%2Fskills%2Fasleep123%2Fcaldav-calendar",
    "sourceType": "search_document",
    "confidence": "medium",
    "observedAt": "2026-04-15T05:03:46.393Z",
    "isPublic": true
  }
]

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