plugin.json
The manifest: name, version, and what the package provides. The repository carries both the Agent Plugins 1.0.0 layout and the near-identical Claude Code variant, so either loader works.
AGENT PLUGIN · SPEC 1.0.0
One install, every agent
The official TickerLayer Agent Plugin packages the hosted MCP endpoint and a market-data skill into one portable folder, following the vendor-neutral Agent Plugins 1.0.0 open spec. Install it with one command and your agent client gets typed market-data tools plus the guidance to use them well.
- Agent Plugins 1.0.0
- plugin.json + skills + mcp.json
- No secrets inside
- Free to install
INSIDE THE PACKAGE
Three parts your agent already understands
A plugin is just a folder in an open format — inspectable in the repository before you install anything.
skills/
Usage guidance an agent reads before calling tools — symbol conventions, a discovery-first workflow, error handling, and market-calendar awareness — in the open agentskills.io format.
mcp.json
Points the client at the hosted MCP endpoint: ten typed tools across seven asset classes, nothing to run locally, and the same server every other integration path uses.
ONE-COMMAND INSTALL
Pick your client
The same package installs across clients. Commands are current as of August 2026; the repository README stays authoritative as client tooling evolves.
/plugin marketplace add tickerlayer/agent-plugin
/plugin install tickerlayerAUTH & SECRETS
The package carries no credentials
Nothing sensitive ships in the plugin. Each client authenticates at connect time, and every request runs under your TickerLayer account's plan, rate limits, and monthly quota.
OAuth sign-in: OAuth-capable clients open the TickerLayer sign-in the first time they connect to the MCP server. Approve once — no key to copy or store.
API key: clients that support custom headers keep using the x-api-key header from your dashboard, exactly as before. Nothing existing changes.
Never: commit a key into the plugin folder, a fork of the repository, or any client config you share. The package is designed to stay secret-free.
ONE STACK, FIVE ENTRY POINTS
Not an alternative to MCP — a package around it
Whichever side of today's agent stack you're on, TickerLayer is ready. The plugin bundles the MCP endpoint and skills into a portable install; everything underneath stays the same.
LayerWhat it gives an agentWhere
DiscoveryMachine-readable platform mapllms.txt · llms-full.txt
Context & toolsTen typed live market-data toolsHosted MCP server
Portable installMCP + skills, one commandAgent Plugin — this page
Agent paymentsAccountless pay-per-request HTTPx402 gateway
Native ChatGPTOAuth sign-in connectorSame hosted MCP endpoint
Read more: MCP server · x402 pay-per-call · llms.txt · AI & Agents hub.
AGENT PLUGIN FAQ
Questions teams ask before installing
An open packaging spec, one public repository, and authentication that stays in the client.
What is Agent Plugins 1.0.0?
Agent Plugins 1.0.0 is a vendor-neutral open packaging spec for distributing agent capabilities, published in August 2026 at agent-plugins.org and governed by a cross-vendor technical steering committee. A plugin is a portable folder: a plugin.json manifest, skills that teach an agent how to use a product, and an mcp.json that points at MCP servers.
Is the Agent Plugin replacing MCP?
No. The plugin is not an alternative to MCP — it packages the hosted MCP endpoint together with usage skills into one portable install. Connected clients still call the same MCP server and the same ten tools; the plugin removes the per-client configuration step and adds guidance the agent can read.
Which clients can install it today?
As of August 2026: Claude Code and Codex CLI through their plugin marketplace commands, Cursor through /add-plugin, and VS Code with GitHub Copilot through “Chat: Install Plugin From Source”. The ChatGPT app skips the package and connects to the same hosted MCP server directly as an OAuth developer-mode connector.
Does the plugin include my API key?
No. The package contains no secrets, ever. Authentication happens in the client at connect time: an OAuth sign-in with your TickerLayer account, or the x-api-key header in clients that support custom headers.
Does it cost anything?
The plugin itself is free and open source. Data usage runs under your TickerLayer account — your plan's entitlements, rate limits, and monthly quota apply to every tool call, exactly as with a direct MCP or REST integration.
How do updates work?
Distribution is git-based. Reinstall the plugin, or use your client's plugin-update command, to pull the latest manifest and skills from the repository. The hosted MCP endpoint the plugin points at updates server-side, with no action needed.
What does the market-data skill teach an agent?
Symbol conventions (stocks always use the MARKET:SYMBOL form), a discovery-first workflow that lists valid symbols before querying, error handling for plan-entitlement responses, and market-calendar guidance so agents check sessions and holidays instead of assuming a market is open.
PORTABLE BY DESIGN
Install once. Point any agent at the market.
Add the plugin from the repository, sign in or paste a key when your client asks, and your agent gets the same typed market data everywhere.