CellKit.
System Status: Testnet MVP

Inspectable CKB
Transaction Actions.

A reusable workflow layer for building, validating, and broadcasting externally signed CKB transactions. API-first. Protocol-grade.

Open PlaygroundView TemplatesGitHub
Network
CKB testnet
Signing
External only
Custody
No private keys
cellkit/action-viz
TESTNET
RPC DRY-RUN
Explicitbefore broadcast
CELL SELECTION
34%visualized
CELL INSPECTORactive

Input Cell

VALUE:84 CKB
API_FIRST

Backend-ready actions

Generate reusable CKB transaction actions from HTTP-friendly inputs, without binding every product surface to a browser wallet SDK.

INSPECTABLE

Form-to-JSON workflows

Turn simple action fields into visible transaction JSON with summaries, warnings, selected cells, fee estimates, and signing steps.

EXTERNAL_SIGNING

Dry-run before broadcast

Keep signing outside CellKit, then validate, dry-run, and submit signed testnet transactions through one explicit verification flow.

Action response console

CellKit is not a wallet. It produces inspectable artifacts for teams that want transaction generation, external signing, validation, and broadcast as separate steps.

JSONREAD-ONLY
BUILD / SIGN / VERIFY
{
  "action": "ckb.transfer",
  "network": "testnet",
  "status": "built",
  "summary": {
    "selectedCellCount": 2,
    "estimatedFeeShannons": "1432"
  },
  "signing": {
    "required": true,
    "where": "external wallet"
  }
}

Verification-first

For CKB transfer, the backend handles live-cell lookup, ordinary cell filtering, deterministic selection, fee estimation, and unsigned skeleton construction.

0
private keys handled by CellKit

Explicit testnet broadcast

Signed transactions are validated and dry-run before broadcast by default. The UI keeps each step visible and deliberate.

Open Broadcast Flow

Supported Actions

MVP transaction templates

View all

CKB Transfer

Build an unsigned CKB transfer transaction for testnet wallets and apps.

xUDT Transfer

Build an unsigned xUDT transfer with token cells, capacity funding, and configured xUDT deps.

Cell Consolidation

Build an unsigned transaction that consolidates ordinary CKB cells back to one owner address.

Capacity Lock

Build an unsigned transfer that funds a target lock address with optional memo metadata.

Data Cell Create

Build an unsigned transaction that creates an ordinary CKB data cell.

Deterministic output.

Every action is built for review. CellKit keeps the transaction shape visible before signatures and network submission.

External signing
Dry-run simulation
Validation Stacktestnet
01 transaction shape check02 witness presence check03 rpc dry-run04 explicit broadcast