# Services from agentresolver.vercel.app on Zero

> agentresolver.vercel.app serves 30 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/agentresolver.vercel.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/agentresolver.vercel.app/health.json

## Services

- [EVM Address EIP-55 Checksum Converter](https://www.zero.xyz/c/evm-address-eip-55-checksum-converter-052f04f0/llms.txt): $0.003/call via x402. Converts a raw EVM address to its EIP-55 checksummed form and returns both lowercase and checksummed variants
- [Solidity Function Selector Calculator](https://www.zero.xyz/c/solidity-function-selector-calculator-6e269865/llms.txt): $0.01/call via x402. Computes the 4-byte ABI function selector and full keccak256 hash for a given Solidity function signature
- [AgentResolver — x402 Payment Preflight & PayTo Verification](https://www.zero.xyz/c/agentresolver-x402-payment-preflight-payto-verification-83d3a2d3/llms.txt): $0.001/call via x402. Verifies an x402 payment endpoint before committing funds, checking the payTo address, USDC quote, network, asset binding, TLS, and endpoint safety.
- [AgentResolver Keccak256 Hash](https://www.zero.xyz/c/agentresolver-keccak256-hash-f6f7cdbd/llms.txt): $0.004/call via x402. Computes the Keccak-256 cryptographic hash of an input string, returning the digest as a 0x-prefixed hex value.
- [EVM Unit Converter — Parse and Format Token Amounts](https://www.zero.xyz/c/evm-unit-converter-parse-and-format-token-amounts-b776a741/llms.txt): $0.005/call via x402. Converts EVM token amounts between human-readable decimal and raw base-unit (wei-style) representations for any token with a specified decimal precision.
- [AgentResolver JSON Schema Validator](https://www.zero.xyz/c/agentresolver-json-schema-validator-edb96427/llms.txt): $0.001/call via x402. Validates a JSON data string against a provided JSON Schema and returns a boolean result with detailed validation errors
- [AgentResolver Hash & Encode](https://www.zero.xyz/c/agentresolver-hash-encode-ee001f68/llms.txt): $0.001/call via x402. Performs cryptographic hashing and encoding operations (SHA-256, SHA-512, HMAC-SHA256, Base64 encode/decode, JWT decode) on a given string input.
- [AgentResolver HTTP Inspector](https://www.zero.xyz/c/agentresolver-http-inspector-e9271403/llms.txt): $0.001/call via x402. Inspects an HTTPS URL via POST request and returns DNS, TLS, HTTP status, redirect, security headers, latency, and cache metadata
- [AgentResolver — x402 Payment Preflight & PayTo Verification](https://www.zero.xyz/c/agentresolver-x402-payment-preflight-payto-verification-95a28f88/llms.txt): $0.001/call via x402. Verifies an x402 payment endpoint before executing payment by checking the payTo address, USDC quote, network, asset binding, TLS safety, and resource validity on Base or Solana.
- [AgentResolver SHA-256 Hash Endpoint](https://www.zero.xyz/c/agentresolver-sha-256-hash-endpoint-94423fcd/llms.txt): $0.001/call via x402. Computes the SHA-256 cryptographic hash of an input string and returns the hex-encoded digest along with metadata about the operation
- [AgentResolver SHA-512 Hash](https://www.zero.xyz/c/agentresolver-sha-512-hash-dca8d5c2/llms.txt): $0.001/call via x402. Computes the SHA-512 cryptographic hash of a given input string, returning the hex-encoded digest along with input byte count and encoding metadata.
- [AgentResolver — OpenAPI Select (Capability Routing)](https://www.zero.xyz/c/agentresolver-openapi-select-capability-routing-1372fe0e/llms.txt): $0.005/call via x402. Given a goal and an OpenAPI spec URL, selects the best matching operation from that spec to fulfill the agent's intent.
- [AgentResolver Base64 Decode](https://www.zero.xyz/c/agentresolver-base64-decode-4e385add/llms.txt): $0.001/call via x402. Decodes a Base64-encoded string back to its original plain-text representation
- [AgentResolver HMAC-SHA256 Signing](https://www.zero.xyz/c/agentresolver-hmac-sha256-signing-51aa5037/llms.txt): $0.001/call via x402. Computes an HMAC-SHA256 message authentication code for a given input string using a secret key
- [AgentResolver Base64 Encode](https://www.zero.xyz/c/agentresolver-base64-encode-2f1429ec/llms.txt): $0.001/call via x402. Encodes an input string to Base64 format, returning the encoded result along with metadata about the operation.
- [AgentResolver x402 Ping](https://www.zero.xyz/c/agentresolver-x402-ping-8ebc4c9f/llms.txt): $0.001/call via x402. Verifies x402 payment-settled connectivity by returning a timestamped pong with request echo and settled delivery confirmation.
- [AgentResolver Slugify](https://www.zero.xyz/c/agentresolver-slugify-834adba6/llms.txt): $0.001/call via x402. Converts arbitrary text into a URL-safe slug using a configurable separator character
- [UUID v4 Generator](https://www.zero.xyz/c/uuid-v4-generator-f73ca945/llms.txt): $0.001/call via x402. Generates one or more random UUID v4 strings in a single API call
- [AgentResolver JWT Decode](https://www.zero.xyz/c/agentresolver-jwt-decode-ecc9be5f/llms.txt): $0.001/call via x402. Decodes a JWT token into its header, payload, and signature components without verifying signature validity
- [AgentResolver ABI Encode — x402 Payment Preflight & PayTo Verification](https://www.zero.xyz/c/agentresolver-abi-encode-x402-payment-preflight-payto-verification-9161fb1d/llms.txt): $0.005/call via x402. ABI-encodes typed Solidity/EVM values for use in x402 payment preflight and payTo verification flows
- [AgentResolver — Verified Capability Resolution](https://www.zero.xyz/c/agentresolver-verified-capability-resolution-85fb7da8/llms.txt): $0.02/call via x402. Routes an AI agent's goal to the most relevant verified machine service, resolving which capability to use and how to execute it.
- [AgentResolver MCP Probe — Capability Routing for AI Agents](https://www.zero.xyz/c/agentresolver-mcp-probe-capability-routing-for-ai-agents-1eb4d5c4/llms.txt): $0.001/call via x402. Probes a given endpoint URL to discover, resolve, and return its machine-readable capability metadata for AI agent routing
- [AgentResolver EIP-712 Hash Computation](https://www.zero.xyz/c/agentresolver-eip-712-hash-computation-32968905/llms.txt): $0.005/call via x402. Computes an EIP-712 structured data hash from typed domain, message, and primary type inputs for use in x402 payment signing flows
- [AgentResolver URL Parser](https://www.zero.xyz/c/agentresolver-url-parser-55b8c9ae/llms.txt): $0.001/call via x402. Parses a URL string into its structured components: protocol, hostname, port, pathname, query parameters, and fragment
- [AgentResolver JSON Normalize](https://www.zero.xyz/c/agentresolver-json-normalize-23d0fbd9/llms.txt): $0.001/call via x402. Normalizes a JSON string value and returns the canonical form along with its SHA-256 hash and byte size
- [AgentResolver — Agent Readiness Check](https://www.zero.xyz/c/agentresolver-agent-readiness-check-d6d0267b/llms.txt): $0.005/call via x402. Checks whether a given URL is agent-ready and capable of being discovered, compared, or executed by AI agents through AgentResolver's capability routing interface.
- [AgentResolver Batch Verified Resolve](https://www.zero.xyz/c/agentresolver-batch-verified-resolve-42b90974/llms.txt): $0.05/call via x402. Resolves and verifies multiple AI agent capability requests in a single batch call, returning matched services, comparisons, and execution metadata.
- [AgentResolver — Tool Contract Capability Router](https://www.zero.xyz/c/agentresolver-tool-contract-capability-router-9e3f8c5d/llms.txt): $0.005/call via x402. Resolves AI agent capability routing by matching consumer input schemas to producer output schemas across discoverable machine services
- [AgentResolver ABI Decode](https://www.zero.xyz/c/agentresolver-abi-decode-babf1cce/llms.txt): $0.005/call via x402. Decodes ABI-encoded hex data into structured values given an array of Solidity type strings
- [AgentResolver ENS Namehash](https://www.zero.xyz/c/agentresolver-ens-namehash-594b2ad3/llms.txt): $0.01/call via x402. Computes the ENS namehash (EIP-137) for a given ENS name string

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)