Polkadot JSON-RPC DevTools

Name: Polkadot JSON-RPC DevTools
Author: victor

Devtools for the polkadot JSON-RPC Spec

As of June 2026, Polkadot JSON-RPC DevTools has 2 users in the Developer Tools category.

victor Developer Tools

Chrome Web Store ↗.crx

Users0%

Rating0%

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— reviews

Reviews0%

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Version

0.1.0

Manifest V3

History

4 snapshots

Tracking since Apr 18, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 18, 2026	2	—	—	0.1.0
Apr 28, 2026	2	—	—	0.1.0
May 15, 2026	2	—	—	0.1.0
May 24, 2026	4	—	—	0.1.0
Now	2	—	—	0.1.0

Permissions & access

Permissions: None declared
Host access: None declared

Screenshots

About

This extension adds a new panel to Chrome DevTools that inspects JSON-RPC messages sent with Polkadot-API. It is useful when debugging applications that speak to Substrate-based chains over JSON-RPC.

Features:
- Groups multiple JSON-RPC connections per tab, so you can inspect all traffic for a page in one place.
- Provides an improved, structured JSON view for requests and responses, making complex payloads easier to read.
- Understands chainHead JSON-RPC methods so you can inspect subscriptions, operations and their lifecycle.
- Lets you follow pinned blocks and track the operations executed on each tracked block.
Decodes operations and responses into a more readable representation while keeping the underlying raw JSON available.