# Services from api.8k4protocol.com on Zero

> api.8k4protocol.com serves 14 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/api.8k4protocol.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.8k4protocol.com/health.json

## Services

- [8k4 Protocol — ERC-8004 Agent Trust Score](https://www.zero.xyz/c/8k4-protocol-erc-8004-agent-trust-score-34538355/llms.txt): $0.001/call via x402. Returns an ERC-8004 trust score, risk band, and confidence tier for a specific on-chain agent by agent ID and chain
- [8k4 Protocol — Agent Validation History](https://www.zero.xyz/c/8k4-protocol-agent-validation-history-6a9adb23/llms.txt): $0.001/call via x402. Retrieves validator feedback and validation history for a specific ERC-8004 agent
- [8k4 Protocol — Resolve Agent Identities by Wallet](https://www.zero.xyz/c/8k4-protocol-resolve-agent-identities-by-wallet-0e9fcf02/llms.txt): $0.001/call via x402. Returns all ERC-8004 agent registrations associated with a given wallet address, including agent IDs, chains, and creation timestamps.
- [8k4 Protocol — Wallet Score Lookup](https://www.zero.xyz/c/8k4-protocol-wallet-score-lookup-5e975273/llms.txt): $0.001/call via x402. Resolve agent identity records and ERC-8004 trust scores associated with a given blockchain wallet address
- [8k4 Protocol — Cross-Chain Identity Registration Lookup](https://www.zero.xyz/c/8k4-protocol-cross-chain-identity-registration-lookup-38e4d0d9/llms.txt): $0.001/call via x402. Returns all cross-chain wallet registrations associated with a given canonical ERC-8004 global agent ID
- [8k4 Protocol — ERC-8004 Agent Trust Score Explanation](https://www.zero.xyz/c/8k4-protocol-erc-8004-agent-trust-score-explanation-79dbdbcf/llms.txt): $0.001/call via x402. Returns a human-readable explanation of an ERC-8004 agent's trust score, including specific positive factors and cautions that contributed to the score.
- [8k4 Protocol — Upload ERC-8004 Agent Metadata](https://www.zero.xyz/c/8k4-protocol-upload-erc-8004-agent-metadata-3afeee51/llms.txt): $0.1/call via x402. Upload signed ERC-8004 metadata for a specific agent to register or update its on-chain trust profile
- [8k4 Protocol — Agent Metadata Lookup](https://www.zero.xyz/c/8k4-protocol-agent-metadata-lookup-c1ec2556/llms.txt): $0.001/call via x402. Returns processed metadata for a specific ERC-8004 agent, including name, chain, and agent ID information
- [ERC-8004 Agent Trust Score Explanation](https://www.zero.xyz/c/api-8k4protocol-com-16da80b7/llms.txt): $0.001/call via x402. Returns a human-readable explanation of an agent's ERC-8004 trust score, including positive factors and cautions driving the score
- [8k4 Protocol RPC Reliability Metrics](https://www.zero.xyz/c/api-8k4protocol-com-ee9f64dc/llms.txt): $0.01/call via x402. Retrieves RPC reliability metrics for the 8k4 Protocol network, supporting trust and performance analysis of blockchain RPC endpoints.
- [ERC-8004 Agent Trust Score Lookup](https://www.zero.xyz/c/api-8k4protocol-com-ec0ab296/llms.txt): $0.001/call via x402. Returns an ERC-8004 trust score for a specific agent on a given blockchain chain
- [8k4 Protocol — Create Signed Metadata Upload Nonce](https://www.zero.xyz/c/8k4-protocol-create-signed-metadata-upload-nonce-938155a7/llms.txt): $0.001/call via x402. Generates a signed nonce required to authorize an ERC-8004 agent metadata upload
- [8K4 Protocol Global Stats](https://www.zero.xyz/c/api-8k4protocol-com-50bc57b6/llms.txt): $0.01/call via x402. Returns full protocol-wide statistics and confidence score distribution for the ERC-8004 agent trust scoring system
- [ERC-8004 Agent Metadata Retrieval](https://www.zero.xyz/c/api-8k4protocol-com-117ccd45/llms.txt): $0.001/call via x402. Retrieves metadata JSON for a specific agent by ID under the ERC-8004 protocol

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)