abi_encode
Build EVM calldata offline: function selector + ABI-encoded arguments from a human signature such as transfer(address,uint256) or exactInputSingle((address,address,uint24,address,uint256,uint256,uint160)). Tuples/structs, fixed and dynamic arrays, bytes, strings and signed ints supported. mode=pa...
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What abi_encode does on ScorpTech x402 API
AI agents invoke abi_encode to trigger actions in ScorpTech x402 API. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
| Parameter | Type | Required | Description |
|---|---|---|---|
args | array | — | Arguments as a JSON array (nested arrays for arrays/tuples; big integers as strings; bytes as 0x-hex) |
mode | string | — | call = selector + abi.encode, params = abi.encode only, packed = abi.encodePacked |
signature | string | Yes | Function signature, e.g. transfer(address,uint256); param names allowed; for mode=params/packed just the type list, e.g. (address,uint256) |
Parameters from the server's own tool schema.
Why abi_encode is rated High
abi_encode triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.
Attacks that exploit this kind of access
The rule that runs abi_encode safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ScorpTech x402 API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For abi_encode, this is the rule to start with:
abi_encode stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect ScorpTech x402 API, apply this rule, and every abi_encode call is checked against it from then on.
Questions about abi_encode
Build EVM calldata offline: function selector + ABI-encoded arguments from a human signature such as transfer(address,uint256) or exactInputSingle((address,address,uint24,address,uint256,uint256,uint160)). Tuples/structs, fixed and dynamic arrays, bytes, strings and signed ints supported. mode=params gives abi.encode without a selector, mode=packed gives abi.encodePacked plus its keccak256 (as used for hashes and signatures). Returns hex, 32-byte words and length. Price: $0.003 USDC per successful call (x402, Solana). Same tool over HTTPS: GET https://scorptech.it.com/api/x402/v1/abi-encode. It is categorised as a Execute tool in the ScorpTech x402 API MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
abi_encode accepts 3 parameters: args, mode, signature. Required: signature. The full parameter table on this page comes from the server's own tool schema.
Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for abi_encode: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches ScorpTech x402 API. Nothing to install.
abi_encode is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the abi_encode rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for abi_encode. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
abi_encode is provided by the ScorpTech x402 API MCP server (https://scorptech.it.com/api/x402/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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