alpaca-mcp-server

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get_all_assets

Retrieve all available assets from Alpaca, filtering by status, asset class, exchange, or attributes to narrow results for trading, research, or portfolio analysis.

Instructions

Get all available assets with optional filtering. WARNING: The unfiltered response is very large (thousands of assets). Always narrow results with the status, asset_class, or exchange parameters. To look up a single asset, use get_asset instead.

Input Schema

TableJSON Schema

Name	Required	Description
`status`	No	e.g. "active". By default, all statuses are included.
`exchange`	No	Optional AMEX, ARCA, BATS, NYSE, NASDAQ, NYSEARCA, OTC or CRYPTO
`attributes`	No	Comma separated values to query for more than one attribute. Assets which have any of the given attributes will be included. Supported values: - `ptp_no_exception`: Asset is a Publicly Traded Partnership (PTP) without a qualified notice; non-U.S. customers may incur 10% withholding on gross proceeds as per IRS guidance, and are blocked from being purchased by default. - `ptp_with_exception`: Users can open positions in these PTPs without general restrictions. - `ipo`: Accepting limit orders only before the stock begins trading on the secondary market. - `has_options`: The underlying equity has listed options available on the platform. Note: if the equity had inactive/expired contracts in the past, this will still show up. - `options_late_close`: Indicates the underlying asset's options contracts close at 4:15pm ET instead of the standard 4:00pm ET. - `fractional_eh_enabled`: Indicates the asset accepts fractional orders during extended hours sessions (pre-market, post-market, and overnight if enabled). - `overnight_tradable`: Asset is eligible for overnight (24x5) trading in supported venues on the platform. - `overnight_halted`: Asset is eligible for overnight trading but is currently halted/blocked for overnight sessions due to risk, corporate action, compliance, or venue constraints.
`asset_class`	No	Defaults to us_equity.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed5 schema fields changedv2.3.2Sep 18, 2026

changedInput schema / properties / attributes / description

Previous value: -"Comma separated values to query for more than one attribute. Assets which have any of the given attributes will be included.\n\nSupported values:\n- `ptp_no_exception`: Asset is a Publicly Traded Partnership (PTP) without a qualified notice; non-U.S. customers may incur 10% withholding on gross proceeds as per IRS guidance, and are blocked from being purchased by default.\n- `ptp_with_exception`: Users can open positions in these PTPs without general restrictions.\n- `ipo`: Accepting limit orders only before the stock begins trading on the secondary market.\n- `has_options`: The underlying equity has listed options available on the platform. Note: if the equity had inactive/expired contracts in the past, this will still show up.\n- `options_late_close`: Indicates the underlying asset's options contracts close at 4:15pm ET instead of the standard 4:00pm ET.\n- `fractional_eh_enabled`: Indicates the asset accepts fractional orders during extended hours sessions (pre-market, post-market, and overnight if enabled).\n- `overnight_tradable`: Asset is eligible for overnight (24x5) trading in supported venues on the platform.\n- `overnight_halted`: Asset is not eligible for overnight trading but is currently halted/blocked for overnight sessions due to risk, corporate action, compliance, or venue constraints."New value: +"Comma separated values to query for more than one attribute. Assets which have any of the given attributes will be included.\n\nSupported values:\n- `ptp_no_exception`: Asset is a Publicly Traded Partnership (PTP) without a qualified notice; non-U.S. customers may incur 10% withholding on gross proceeds as per IRS guidance, and are blocked from being purchased by default.\n- `ptp_with_exception`: Users can open positions in these PTPs without general restrictions.\n- `ipo`: Accepting limit orders only before the stock begins trading on the secondary market.\n- `has_options`: The underlying equity has listed options available on the platform. Note: if the equity had inactive/expired contracts in the past, this will still show up.\n- `options_late_close`: Indicates the underlying asset's options contracts close at 4:15pm ET instead of the standard 4:00pm ET.\n- `fractional_eh_enabled`: Indicates the asset accepts fractional orders during extended hours sessions (pre-market, post-market, and overnight if enabled).\n- `overnight_tradable`: Asset is eligible for overnight (24x5) trading in supported venues on the platform.\n- `overnight_halted`: Asset is eligible for overnight trading but is currently halted/blocked for overnight sessions due to risk, corporate action, compliance, or venue constraints."

addedInput schema / properties / attributes / items / description

Added value: +"Unique characteristic of an asset. Supported values:\n- `ptp_no_exception`: Asset is a Publicly Traded Partnership (PTP) without a qualified notice; non-U.S. customers may incur 10% withholding on gross proceeds as per IRS guidance, and are blocked from being purchased by default.\n- `ptp_with_exception`: Users can open positions in these PTPs without general restrictions.\n- `ipo`: Accepting limit orders only before the stock begins trading on the secondary market.\n- `has_options`: The underlying equity has listed options available on the platform. Note: if the equity had inactive/expired contracts in the past, this will still show up.\n- `options_late_close`: Indicates the underlying asset's options contracts close at 4:15pm ET instead of the standard 4:00pm ET.\n- `fractional_eh_enabled`: Indicates the asset accepts fractional orders during extended hours sessions (pre-market, post-market, and overnight if enabled).\n- `overnight_tradable`: Asset is eligible for overnight (24x5) trading in supported venues on the platform.\n- `overnight_halted`: Asset is eligible for overnight trading but is currently halted/blocked for overnight sessions due to risk, corporate action, compliance, or venue constraints."

addedInput schema / properties / attributes / items / example
```
Added value: +"ptp_no_exception"
```

changedInput schema / properties / exchange / description

Previous value: -"Optional AMEX, ARCA, BATS, NYSE, NASDAQ, NYSEARCA or OTC"New value: +"Optional AMEX, ARCA, BATS, NYSE, NASDAQ, NYSEARCA, OTC or CRYPTO"

changedInput schema / properties / status / description

Previous value: -"e.g. “active”. By default, all statuses are included."New value: +"e.g. \"active\". By default, all statuses are included."

Addedv2.0.0Apr 15, 2026

TDQS

A4.5/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It warns about the large unfiltered response size and advises filtering, which is important behavioral context beyond the schema. It doesn't mention pagination or rate limits, but the warning is the most critical behavioral trait for this list endpoint, so a 4 is appropriate.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences with zero wasted words. It front-loads the purpose, includes an essential warning, and names the alternative tool. Every sentence contributes value.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the output schema exists, return values don't need explanation. The description covers the essential usage context: it's a list tool with optional filters, warns about the large response, and directs to a more specific sibling tool. This is complete for a filtered-list tool with fully documented schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, with each parameter already having a detailed description, especially the attributes enum. The description adds a hint to use status, asset_class, or exchange for narrowing, but doesn't add new syntax or detail beyond the schema, so the baseline of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb and resource: "Get all available assets with optional filtering." It explicitly distinguishes from the sibling tool get_asset by stating "To look up a single asset, use get_asset instead," making the scope clear.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides explicit when-to-use guidance by warning that the unfiltered response is very large and instructing to always narrow results with status, asset_class, or exchange. It also names the alternative tool (get_asset) for single-asset lookups, which is clear exclusion guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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