Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add BlockRunAI/blockrun-mcp --skill rpcgit clone --depth 1 https://github.com/BlockRunAI/blockrun-mcpWrote 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.
[](https://agentmods.dev/skills/blockrunai/blockrun-mcp/rpc)<a href="https://agentmods.dev/skills/blockrunai/blockrun-mcp/rpc"><img src="https://agentmods.dev/badge/skills/blockrunai/blockrun-mcp/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.
<a href="https://agentmods.dev/skills/blockrunai/blockrun-mcp/rpc"><img src="https://agentmods.dev/badge/skills/blockrunai/blockrun-mcp/rpc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00091 | $0.01479 |
| Opus 5.5 | $0.00036 | $0.00592 |
| Sonnet 5.5 | $0.00018 | $0.00296 |
| Haiku 4.5 | $0.00009 | $0.00148 |
Grade A, and why
rpc scanned grade A with 0 findings 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Multi-chain RPC — every supported chain, one tool
blockrun_rpc POSTs a standard JSON-RPC 2.0 body to /v1/rpc/{network}. Flat $0.0030 per call ($0.002 base + the $0.001 transaction fee). A JSON-RPC batch array charges per element but pays the flat fee only once — $0.002 × n + $0.001, so a batch of 3 costs $0.0070 where three separate calls cost $0.0090. Batch whenever you can. Settlement in USDC via x402. Responses are cached briefly server-side for identical read calls (X-Cache: HIT is free of upstream latency but still billed).
When to use which tool
| Question | Tool |
|---|---|
| "What's ETH trading at?" | blockrun_price (free) |
| "PEPE/WETH pool liquidity?" | blockrun_dex (free) |
| "What's this wallet holding?" | blockrun_rpc (labels: no tool since Surf was retired 2026-09-06) |
"Call balanceOf(0x...) on this ERC-20" |
blockrun_rpc |
| "Latest block / tx receipt / event logs / gas price" | blockrun_rpc |
| "Solana account info / slot / signatures" | blockrun_rpc |
Networks
EVM (use eth_* methods):
| Key | Chain | Key | Chain | |
|---|---|---|---|---|
ethereum |
Ethereum | zksync |
zkSync Era | |
base |
Base | berachain |
Berachain | |
arbitrum |
Arbitrum One | unichain |
Unichain | |
arbitrum-nova |
Arbitrum Nova | monad |
Monad | |
optimism |
Optimism | chiliz |
Chiliz | |
polygon |
Polygon | moonbeam |
Moonbeam | |
bsc |
BNB Smart Chain | aurora |
Aurora | |
avalanche |
Avalanche C-Chain | flare |
Flare | |
fantom |
Fantom | oasis |
Oasis Sapphire | |
cronos |
Cronos | kaia |
Kaia (Klaytn) | |
celo |
Celo | sonic |
Sonic | |
gnosis |
Gnosis | xdc |
XDC Network | |
abstract |
Abstract | hyperevm |
HyperEVM | |
plume |
Plume | ronin |
Ronin | |
rootstock |
Rootstock (RSK) |
Non-EVM (chain-native methods):
| Key | Chain | Method family |
|---|---|---|
solana |
Solana | getSlot, getBalance, getAccountInfo, getSignaturesForAddress |
bitcoin |
Bitcoin | getblockchaininfo, getblockcount, getrawtransaction |
litecoin / dogecoin / bitcoin-cash / zcash |
UTXO chains | Bitcoin-style RPC |
near |
NEAR | status, query |
sui |
Sui | sui_getLatestCheckpointSequenceNumber, suix_getBalance |
ripple |
XRP Ledger | account_info, ledger |
polkadot / kusama |
Substrate | chain_getHeader, state_getStorage |
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.
- 1mo ago Changed · -1 tokens per session 3842012a11d5
- 1mo ago Changed 000133e78b45
- 1mo ago First seen · 107 lines · 92 tokens per session scan A 5a4e764c2064
rpc is a skill published in the GitHub repository BlockRunAI/blockrun-mcp (391 stars, last pushed yesterday), licensed MIT. It adds 91 tokens to every session and 1,479 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
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x402
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bridgenode
BridgeNode MCP wrapper — stdio MCP server proxying to remote streamable-HTTP endpoint with automatic x402 payment on Solana USDC. No API keys. Use when an agent needs LLM inference through MCP (Claude Code, Cursor, etc.) and has no provider API key.
onesource-report-bug
Report a bug or unexpected error in OneSource MCP to the OneSource team using the 1sreportbug tool. Use when a 1s blockchain tool returns an unexpected error, or when the user explicitly asks to report a problem. Free, no payment required. Do NOT report 402 (payment/auth) or 403 (subscription) responses — those are…
x402-payments
Quote and settle OpenMesha x402 paywalled services (USDC on Base). Use when metering tool calls, outcome fees, or agent-to-agent settlement.
mpp-agent
Pay HTTP 402 APIs via Machine Payments Protocol (MPP).