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Model Context Protocol

Open protocol so tools, data, and prompts plug into many harnesses. The connect slice Leyline ranks, not a marketplace.

MCP declaredAPI declaredCost freeLicence MIT

Interface

mcp

Model Context Protocol server

Interface

http

HTTP API

Plan with Model Context ProtocolOpen homepageOpen repositoryRead docs

[ Observed sample ]

Frequency in Leyline's observed sample

The count is distinct observed stacks. It is not a Score input.

Appears in 1 distinct stacks in Leyline's observed sample.

Source: action-catalog. Method distinct-stacks. Observed 2026-10-11.

Record cmp_model-context-protocol

Open ranks

[ Score explain ]

Why the Score is 23

How Score works

Score v2 uses only observed signals. The displayed contribution is weight × value × 100. Missing factors are insufficient evidence.

Score factor

GitHub health

18% weight. A licence is declared. Documentation is available.

Value 0.30 · 5.4 points

18% weight × 0.30 value

5.4 points

A licence is declared. Documentation is available.

Score factor

Agent use

16% weight. insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

Score factor

Human notes

14% weight. 1 stored human notes (component-record).

Value 0.09 · 1.2 points

14% weight × 0.09 value

1.2 points

1 stored human notes (component-record).

Score factor

Composability

16% weight. insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

Score factor

Checklist

10% weight. An MCP surface is declared. An API is declared. Cost is free. 3 of 3 checklist fields are complete.

Value 1.00 · 10.0 points

10% weight × 1.00 value

10.0 points

An MCP surface is declared. An API is declared. Cost is free. 3 of 3 checklist fields are complete.

Score factor

Evidence quality

14% weight. 3 sources cover 3 evidence types. The latest dated evidence is 2026-09-12. Freshness is omitted unless observed as a signal.

Value 0.46 · 6.5 points

14% weight × 0.46 value

6.5 points

3 sources cover 3 evidence types. The latest dated evidence is 2026-09-12. Freshness is omitted unless observed as a signal.

Score factor

Benchmarks

12% weight. insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

insufficient evidence

Total23.08 → 23 after rounding

Agent use: insufficient evidence

Composability: insufficient evidence

Benchmarks: insufficient evidence

[ Claims ]

Publisher-asserted record

Claims are what the publisher declares. Score uses observed signals, not these assertions, except for checklist fields derived from interfaces. MCP, API, cost, and license claims are marked verified, unverified, or contradicted from intake evidence.

Kind
protocol
Interfaces

Interface

mcp

Model Context Protocol server

Interface

http

HTTP API

Functions

Function

Connect

speak a protocol (MCP, API, CLI)

Connect Browse Connect

Function

Tool-call

invoke an external action

Tool-call Browse Tool-call

Function

Route

send work to the right tool

Route Browse Route

Function

Auth

prove identity or permission

Auth Browse Auth
Tags
None recorded

[ Capability slices ]

Compose the useful parts.

route

Route

Open protocol so tools, data, and prompts plug into many harnesses. The connect slice Leyline ranks, not a marketplace.

freeCompose with this
auth

Auth

Open protocol so tools, data, and prompts plug into many harnesses. The connect slice Leyline ranks, not a marketplace.

freeCompose with this

The point of MCP is composability. Spec, SDKs, and remote servers are the glue. Auth and transport still fragment.

[ Relations ]

Derived alternatives and shared slots

  • Fills the same slot as
    MCP / AI Gateway Shared functions auth, connect, route, tool-call. Can fill the same function slot.
  • Fills the same slot as
    Monid Shared functions connect, route, tool-call. Can fill the same function slot.
  • Fills the same slot as
    OpenRouter Shared functions route, tool-call. Can fill the same function slot.
  • Fills the same slot as
    OpenShip Shared functions connect, tool-call. Can fill the same function slot.
  • Fills the same slot as
    BlockRun Shared functions route, tool-call. Can fill the same function slot.
  • Fills the same slot as
    Monetization Gateway Shared functions connect, tool-call. Can fill the same function slot.
  • Fills the same slot as
    Railcode Shared functions auth, tool-call. Can fill the same function slot.
  • Fills the same slot as
    ASP.NET Core Shared functions auth, tool-call. Can fill the same function slot.

[ Signals ]

Observed evidence and source claims

Signals carry source, method, and observedAt. Source review dates and evidence basis are shown separately. Unobserved metrics stay insufficient evidence.

  • docs
    MCP site

    Evidence basis unknown · Check date unknown · Source date 2026-09-12

  • github
    specification

    Evidence basis unknown · Check date unknown · Source date 2026-09-12

  • tweet
    GCP Weekly MCP gateway

    Evidence basis unknown · Check date unknown · Source date 2026-09-12

AI Agents with MCP (Model Context Protocol) MCP is an open protocol that standardizes how AI applications connect to external tools, data sources, and services.

Source: x.com

This guide walks through the fundamentals of the Model Context Protocol (MCP) — the open standard that lets agents securely connect to tools, data, and systems.

Source: x.com

Add currency tools to an agent using MCP. Take this lab to learn how to deploy an ADK agent and modify it to use the Model Context Protocol (MCP) server ...

Source: x.com
Suggest a correction

Propose a change with a public source. Corrections wait for review before the card changes.

[ Notes ]

agentChecklist field 'Has MCP?' is a protocol-level question this item defines.