A guide for querying EVM JSON-RPC endpoints to investigate blockchain transactions. EVM means the Ethereum Virtual Machine, and JSON-RPC is the request format used to ask a node for transaction data or execution traces.

Use it to inspect transaction status and receipts, run execution traces, debug EVM transactions, compare EVM and Cosmos results, and select mainnet, testnet, or archive endpoints.

It helps determine whether a transaction succeeded, retrieve its receipt, trace what happened during execution, and choose the appropriate blockchain endpoint.

evm-rpc — Skill for Claude Code and Codex by Unique-Divine

Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/unique-divine/jiyuu/evm-rpc/github.svg)](https://agentmods.dev/skills/unique-divine/jiyuu/evm-rpc)

Your own site

<a href="https://agentmods.dev/skills/unique-divine/jiyuu/evm-rpc"><img src="https://agentmods.dev/badge/skills/unique-divine/jiyuu/evm-rpc/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/unique-divine/jiyuu/evm-rpc"><img src="https://agentmods.dev/badge/skills/unique-divine/jiyuu/evm-rpc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 66 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,375 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00066	$0.03375
Opus 5	$0.00033	$0.01688
Sonnet 5	$0.00013	$0.00675
Haiku 4.5	$0.00007	$0.00337

Measured 9d ago against content hash 80089fec18d6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

evm-rpc scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -X POST \

ai-skills/evm-rpc/SKILL.md · 345 lines

How it starts

The opening of the file, as written. The whole thing — 345 lines — stays where its author put it; the contents beside it link to each section on GitHub.

EVM RPC: Receipt and Trace Playbook

Use this skill for EVM transaction debugging with JSON-RPC.

Quick Start

Set a hash and endpoint, then run receipt first and trace second.

evm_tx="0xYOUR_evm_tx"
EVM_RPC="https://evm-rpc.archive.testnet-2.nibiru.fi"

curl -s -X POST \
  -H "Content-Type: application/json" \
  --data "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getTransactionReceipt\",\"params\":[\"$evm_tx\"],\"id\":1}" \
  "$EVM_RPC" | jq

curl -s -X POST \
  -H "Content-Type: application/json" \
  --data "{\"jsonrpc\":\"2.0\",\"method\":\"debug_traceTransaction\",\"params\":[\"$evm_tx\",{\"tracer\":\"callTracer\"}],\"id\":1}" \
  "$EVM_RPC" | jq

Endpoint Map - Nibiru Examples

Chain-agnostic rule: methods determine endpoint family.

Purpose	Example endpoint	Methods
EVM JSON-RPC (mainnet)	`https://evm-rpc.nibiru.fi`	`eth_`, `debug_`, `net_`, `web3_`
EVM JSON-RPC archive (mainnet)	`https://evm-rpc.archive.nibiru.fi`	historical reads, tracing
EVM JSON-RPC archive (testnet)	`https://evm-rpc.archive.testnet-2.nibiru.fi`	testnet tracing and historical reads
Comet RPC archive (mainnet)	`https://rpc.archive.nibiru.fi`	`/block_results`, `/consensus_params`
Comet RPC archive (testnet)	`https://rpc.archive.testnet-2.nibiru.fi`	`/block_results`, `/consensus_params`

Rules:

Run eth_* and debug_* only on EVM RPC endpoints.
Run /block_results and /consensus_params only on Comet RPC endpoints.
Prefer archive endpoints for old heights/hashes and tracing workflows.

Basic Queries (Health / Identity)

web3_clientVersion

Queries the traceability info like the client name, version, Git commit, Go version, runtime architecture, and build tags.

curl -X POST https://evm-rpc.nibiru.fi \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "web3_clientVersion",
    "params": [],
    "id": 1
  }'

The response looks like this: "Nibiru 2.6.0: Compiled at Git commit 3cf97e3468f8ce922c8760f839f8f336ca0c37f4 using Go go1.24.5, arch amd64, and build tags (netgo osusergo ledger static rocksdb pebbledb muslc)"

Read the full file on GitHub · 345 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

9d ago First seen · 345 lines · 66 tokens per session scan A 80089fec18d6

Subscribe to this mod's changes

evm-rpc is a skill published in the GitHub repository Unique-Divine/jiyuu (6 stars, last pushed 2d ago), licensed MIT. It adds 66 tokens to every session and 3,375 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Debugging Go Web3 and blockchain ai-context algorithms anki-cards coverage-report go

code-changes

Orchestration workflow for any task that ends in code changes: issue analysis, pull request review, feature implementation, bug fixes, refactors, or fleshing out an idea. MUST be invoked at the start of such a task, before reading or writing any code. Defines how to analyze first, gate on user approval, plan, pick the…

JanDeDobbeleer/oh-my-posh · 88 tokens

pi-loop-forensics

Diagnose pi-go agent loops and degenerate turns — "agent loop aborted", runaway thinking with no tool calls, repeated phrases. Discriminates genuine model repetition collapse from a race, a tool-parse failure, or a too-low guard, and A/B replays a seed session across providers.

dimetron/pi-go · 65 tokens

nightly-session-watch

Nightly sweep of the last 24h of pi-go sessions — anomalous runs, loop aborts, tool error rates, token waste, real prompt-token spend, and whether the observation and palace pipelines are still recording. Triages each finding to the specialist skill that diagnoses it. Use for an unattended daily health check, or on…

dimetron/pi-go · 78 tokens

evm-rpc