# onchain-risk-oracle A2A Agent

**Canonical:** https://apis.io/apis/evebrief-org/onchain-risk-oracle-a2a-agent/  
**Provider:** openclaw / evm-lab — https://apis.io/providers/evebrief-org/  
**Base URL:** https://oracle.evebrief.org/  
**Documentation:** https://oracle.evebrief.org/.well-known/agent-card.json

onchain-risk-oracle A2A Agent is one of 2 APIs that [openclaw / evm-lab](https://apis.io/providers/evebrief-org/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include A2A, Agent-Native, x402, and XRPL.

Agent2Agent (A2A) protocol surface: an agent card at https://oracle.evebrief.org/.well-known/agent-card.json (protocolVersion 0.3.0, JSONRPC transport, version 0.1.0, provider "openclaw / evm-lab") advertising one skill, onchain-risk-check — send an EVM address (optionally chain, deep, fork) and receive a structured risk verdict (none / low / high / critical) with labels, reasons, evidence and sources. The JSON-RPC endpoint is the host root, https://oracle.evebrief.org/; the card declares the x402 payment extension as REQUIRED (exact scheme, network xrpl:0, asset RLUSD, amount 0.01, facilitator xrpl-facilitator-mainnet.t54.ai) and both GET and POST on the endpoint return HTTP 402 with x402 v2 PaymentRequirements until paid. Streaming, push notifications and state-transition history are declared unsupported.

## Machine-readable artifacts (2)

- **AgentCard** — https://raw.githubusercontent.com/api-evangelist/evebrief-org/refs/heads/main/a2a/evebrief-org-a2a.yml
- **AgentCard** — https://oracle.evebrief.org/.well-known/agent-card.json

## Other openclaw / evm-lab APIs (1)

- [onchain-risk-oracle API](https://apis.io/apis/evebrief-org/onchain-risk-oracle-api/)

## Tags

A2A, Agent-Native, x402, XRPL

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/evebrief-org/onchain-risk-oracle-a2a-agent/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/evebrief-org/.