Blocksize Agentic Market Intelligence

Instrument List

list_instruments

Read-onlyIdempotent

List the supported instruments for one Blocksize service. This is free, read-only catalog metadata; it does not fetch live prices, create accounts, or start x402 payment.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`limit`	No	Maximum instruments to return. Use offset to traverse the stable catalog without requesting the entire upstream array.
`offset`	No	Zero-based offset into the sorted instrument catalog.
`service`	No	Blocksize service namespace to list: vwap for crypto VWAP pairs, bidask for shared bid/ask symbols including supported equities, fx for FX pairs, or metal for metals.	vwap

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedAug 26, 2026

addedInput schema / properties / limit

Added value: +{
+  "default": 100,
+  "description": "Maximum instruments to return. Use offset to traverse the stable catalog without requesting the entire upstream array.",
+  "maximum": 500,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / offset

Added value: +{
+  "default": 0,
+  "description": "Zero-based offset into the sorted instrument catalog.",
+  "minimum": 0,
+  "type": "integer"
+}

Changed1 schema field changedJun 19, 2026

changedInput schema / properties / service / description

Previous value: -"Blocksize service namespace to list: vwap for crypto VWAP pairs, bidask for shared bid/ask symbols, fx for FX pairs, or metal for metals."New value: +"Blocksize service namespace to list: vwap for crypto VWAP pairs, bidask for shared bid/ask symbols including supported equities, fx for FX pairs, or metal for metals."

Changed2 schema fields changedApr 28, 2026

addedInput schema / properties / service / description

Added value: +"Blocksize service namespace to list: vwap for crypto VWAP pairs, bidask for shared bid/ask symbols, fx for FX pairs, or metal for metals."

addedInput schema / properties / service / enum

Added value: +[
+  "vwap",
+  "bidask",
+  "fx",
+  "metal"
+]

First observedApr 26, 2026

TDQS

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