Bankr X402 Sdk Capabilities
- 358 installs
- 80 repo stars
- Updated March 24, 2026
- bankrbot/claude-plugins
bankr x402 sdk - capabilities is a Claude skill that documents @bankr/sdk natural-language operations, supported EVM chains, and x402 micropayment costs for developers who need to scope Bankr SDK integrations before writ
About
bankr x402 sdk - capabilities is a Bankr developer skill for the `@bankr/sdk` TypeScript client powered by x402 micropayments on Base. The SDK accepts natural-language prompts via `BankrClient.promptAndWait` and returns transaction metadata arrays for client-side signing with your wallet. Documented operations include token swaps, transfers, ETH/WETH wrap and unwrap, EVM bridges, leverage positions, NFT buy/mint/transfer, staking, and balance queries. Supported EVM chains are Base (default), Ethereum, and Polygon; Solana, Polymarket, on-chain DCA/TWAP, and limit orders are out of scope for the SDK path. Each prompt costs $0.01 USDC via x402 micropayments, with gas paid separately. Developers reach for this skill before coding to confirm which DeFi workflows the SDK can generate and when to fall back to the Bankr Agent API instead.
- Full x402 SDK surface area
- Supported chains and methods
- Agent integration limits
- Feature scoping checklist
Bankr X402 Sdk Capabilities by the numbers
- 358 all-time installs (skills.sh)
- Ranked #424 of 1,877 Documentation skills by installs in the Skillselion catalog
- Data as of Jul 31, 2026 (Skillselion catalog sync)
npx skills add https://github.com/bankrbot/claude-plugins --skill bankr-x402-sdk---capabilitiesAdd your badge
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| Installs | 358 |
|---|---|
| repo stars | ★ 80 |
| Last updated | March 24, 2026 |
| Repository | bankrbot/claude-plugins ↗ |
What operations does the Bankr x402 SDK support?
Map x402 SDK capabilities before coding—supported chains, payment methods, limits, and agent hooks—to scope Bankr plugin features correctly.
Who is it for?
Developers evaluating @bankr/sdk for wallet-signed DeFi workflows who need a capability checklist before implementation.
Skip if: Developers who require Solana trading, Polymarket bets, or Agent API async jobs without x402 micropayments.
When should I use this skill?
User asks what the Bankr SDK supports, about x402 payments, or SDK supported commands before coding.
What you get
SDK capability matrix, supported chain list, micropayment cost notes, and example BankrClient.promptAndWait usage pattern.
- SDK capability reference
- Chain support matrix
- Example BankrClient integration snippet
By the numbers
- $0.01 USDC x402 micropayment per SDK prompt on Base
- Documents 3 supported EVM chains: Base, Ethereum, Polygon
Files
Safety & Access Control
Comprehensive safety guidance for using the Bankr API and CLI.
API Key Types
Bankr uses a single key format (bk_...) with capability flags:
| Flag | Controls | Default |
|---|---|---|
agentApiEnabled | /agent/* endpoints | false |
llmGatewayEnabled | LLM Gateway at llm.bankr.bot | false |
readOnly | Restricts agent to read-only tools | false |
Manage flags at bankr.bot/api.
Read-Only API Keys
When readOnly: true, all write tools are filtered from the agent session:
Allowed: Balances, prices, analytics, portfolio, research Blocked: Swaps, transfers, NFT purchases, staking, orders, token launches, leverage, Polymarket bets, claims
The /agent/sign and /agent/submit endpoints return 403 for read-only keys.
IP Whitelisting
Set allowedIps on your API key to restrict usage to specific IPs. Requests from non-whitelisted IPs are rejected with 403.
- Empty array = all IPs allowed (default)
- Non-empty array = only listed IPs can use the key
Dedicated Agent Wallet
When building autonomous agents, create a separate Bankr account rather than using your personal wallet:
- Limited exposure — compromised key only exposes agent wallet funds
- Clear accounting — agent transactions isolated from personal activity
- Independent controls — apply stricter access controls without affecting personal use
- Easy revocation — disable agent account without disrupting primary wallet
Recommended Funding
| Chain | Gas Buffer | Trading Capital |
|---|---|---|
| Base | 0.01-0.05 ETH | As needed |
| Polygon | 5-10 MATIC | As needed |
| Ethereum | 0.05-0.1 ETH | As needed |
| Solana | 0.1-0.5 SOL | As needed |
Rate Limits
| Tier | Daily Limit |
|---|---|
| Standard | 100 messages/day |
| Bankr Club | 1,000 messages/day |
| Custom | Set per API key |
Reset window is 24 hours from first message (rolling), not midnight.
Key Management
- Store keys in environment variables (
BANKR_API_KEY,BANKR_LLM_KEY), never in source code - Add
~/.bankr/and.envto.gitignore - Rotate keys periodically at bankr.bot/api
- Revoke immediately if compromised
- Use separate keys for Agent API vs LLM Gateway if needed
Transaction Safety
- Test first — small amounts on Base/Polygon before scaling
- Verify recipients — double-check addresses before transfers
- Gas buffer — keep enough native tokens for gas
- Immediate execution —
/agent/submitexecutes with no confirmation prompt - Understand calldata — verify trusted source for arbitrary transactions
Pre-Deployment Checklist
- Use a dedicated agent wallet, not your personal account
- Fund with limited amounts appropriate to purpose
- Set read-only if agent only queries data
- Configure IP whitelisting for server-side agents
- Store keys in environment variables
- Test with small amounts first
- Implement error handling for rate limits (429) and access control (403)
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Pick x402 SDK capabilities for wallet-signed @bankr/sdk flows; use bankr dev api basics when you need Agent API keys and async job polling instead.
FAQ
Which chains does Bankr x402 SDK support?
Bankr x402 SDK capabilities documents EVM support for Base (default), Ethereum, and Polygon. Non-EVM chains such as Solana and Polymarket betting require other Bankr products outside the SDK path.
What does each Bankr SDK prompt cost?
Bankr x402 SDK capabilities states each natural-language prompt costs $0.01 USDC via x402 micropayments on Base, with gas fees paid separately when submitting returned transactions.