Anchor X402

hypeprinter007-stack/anchor-x402-mcp

Exposes 14 pay-per-call tools that hit anchor-x402's API using USDC micropayments on Base. Nine commodity primitives cover on-chain anchoring, sanctions screening, transaction decoding, ENS/SNS resolution, and bundled wallet intelligence. Five LLM endpoints handle roasts, yes/no oracles with cryptographic receipts, URL summarization, aura reads, and grading. Each call costs $0.001 to $0.05 and debits directly from your configured EVM wallet via Coinbase's x402 protocol. No API keys, no subscriptions, no prepayment. Useful when you want Claude or another agent to anchor hashes to mainnet, screen wallets against OFAC lists, or decode raw calldata without leaving the chat.

GitHub stars: 1
tools: 18
auth: Secret needed
transport: STDIO, HTTP
env var: 1
last updated: Aug 14, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://api.anchor-x402.com/mcp --name anchor-x402

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http anchor-x402 https://api.anchor-x402.com/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 18 tools

Verified live against the running server on Nov 6, 2026.

anchor_hashAnchor a 32-byte hash to Base + Solana mainnet in parallel. Returns both tx URLs as cryptographic proof of when the hash existed. $0.005 USDC.3 params

Anchor a 32-byte hash to Base + Solana mainnet in parallel. Returns both tx URLs as cryptographic proof of when the hash existed. $0.005 USDC.

Parameters* required

datavalue

Arbitrary JSON to be canonicalized + SHA-256'd by the server. Mutually exclusive with `hash`.

hashvalue

Pre-computed 32-byte hex hash (64 chars, no 0x prefix). Mutually exclusive with `data`.

notevalue

Optional 200-char note included in the response (not on-chain).

attest_decisionAttest a decision over (input_hash, output_hash, decision): sign it yourself, or omit the signature and the treasury signs for you — then dual-chain anchor. Returns the signer, on-chain proof URLs, and a free re-verify URL. $0.010 USDC.6 params

Attest a decision over (input_hash, output_hash, decision): sign it yourself, or omit the signature and the treasury signs for you — then dual-chain anchor. Returns the signer, on-chain proof URLs, and a free re-verify URL. $0.010 USDC.

Parameters* required

decision*string

Free-form short label, e.g. "APPROVED", "REJECTED", "CONFIDENCE=0.93".

input_hash*string

64-char hex SHA-256 of the agent's input.

output_hash*string

64-char hex SHA-256 of the agent's output / decision payload.

schemevalue

Signature scheme when you supply a `signature`: "eip191" (EVM) or "ed25519" (Solana).

signaturevalue

0x-prefixed hex (eip191) or base58 (ed25519). Omit to have the anchor-x402 treasury sign for you (hosted-signer mode, for wallet-less agents).

signer_pubkeyvalue

Required for ed25519 (Solana base58 pubkey). Ignored for eip191 — address is recovered.

aura_readRead the aura of anything — color, tier (S/A/B/C/D/F), score 0-9999, description. $0.01 USDC.1 params

Read the aura of anything — color, tier (S/A/B/C/D/F), score 0-9999, description. $0.01 USDC.

Parameters* required

target*string

Anything to read the aura of.

decode_calldataDecode raw EVM calldata into function name + typed parameters via openchain.xyz + eth_abi. EVM-only. $0.001 USDC.3 params

Decode raw EVM calldata into function name + typed parameters via openchain.xyz + eth_abi. EVM-only. $0.001 USDC.

Parameters* required

calldata_hex*string

Raw EVM calldata (>=4-byte selector), with or without 0x prefix.

chain*string

"ethereum" supported; "solana" returns 400.one of ethereum · solana

contract_addressvalue

Optional. Reserved for future on-chain ABI lookups; currently unused.

decode_txStructured decode of any mainnet transaction by hash. Supports Base, Ethereum, Solana. Mined txs cached. $0.001 USDC.2 params

Structured decode of any mainnet transaction by hash. Supports Base, Ethereum, Solana. Mined txs cached. $0.001 USDC.

Parameters* required

chain*string

one of base · ethereum · solana

tx_hash*string

grade_targetAcademic letter grade with red-pen marginalia for anything. $0.01 USDC.1 params

Academic letter grade with red-pen marginalia for anything. $0.01 USDC.

Parameters* required

target*string

Anything to grade.

intel_walletUnified wallet intelligence bundle. ONE call: balances on Base + Ethereum + Solana, USDC, tx counts, ENS/SNS reverse, sanctions verdict. 8-10 parallel sources. $0.005 USDC.1 params

Unified wallet intelligence bundle. ONE call: balances on Base + Ethereum + Solana, USDC, tx counts, ENS/SNS reverse, sanctions verdict. 8-10 parallel sources. $0.005 USDC.

Parameters* required

wallet*string

EVM 0x… address (40 hex) or Solana base58 pubkey.

investigate_walletAgent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $1.77 USDC.1 params

Agent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $1.77 USDC.

Parameters* required

address*string

EVM 0x... or Solana base58 address to investigate.

ledger_reportSigned + dual-chain-anchored x402 expense report (markdown + CSV, async job). $0.35 USDC.10 params

Signed + dual-chain-anchored x402 expense report (markdown + CSV, async job). $0.35 USDC.

Parameters* required

directionstring

outbound = spend, inbound = revenue.one of outbound · inbound · bothdefault: outbound

formatstring

Which report files to produce. Default both.one of markdown · csv · bothdefault: both

fromvalue

ISO date or datetime, start of range. Default: 30 days before `to`.

group_bystring

one of service · recipient · daydefault: service

include_unfilteredboolean

Include non-x402 USDC transfers as category=other_transfer.default: false

min_amountvalue

Minimum USDC per transfer, e.g. 0.001.

prepared_forvalue

Optional client name for the report header.

titlevalue

Report title; appears in the markdown header.

tovalue

ISO date or datetime, end of range. Default: now.

wallet*string

EVM address (Base) whose x402 spend to reconstruct.

ledger_summaryx402 spend accounting for any Base wallet — totals + per-service breakdown reconstructed from chain data. $0.01 USDC.7 params

x402 spend accounting for any Base wallet — totals + per-service breakdown reconstructed from chain data. $0.01 USDC.

Parameters* required

directionstring

outbound = spend, inbound = revenue.one of outbound · inbound · bothdefault: outbound

fromvalue

ISO date or datetime, start of range. Default: 30 days before `to`.

group_bystring

one of service · recipient · daydefault: service

include_unfilteredboolean

Include non-x402 USDC transfers as category=other_transfer.default: false

min_amountvalue

Minimum USDC per transfer, e.g. 0.001.

tovalue

ISO date or datetime, end of range. Default: now.

wallet*string

EVM address (Base) whose x402 spend to reconstruct.

oracle_verdictYes/no oracle with dual-chain anchored verdict (Base + Solana). $0.05 USDC.1 params

Yes/no oracle with dual-chain anchored verdict (Base + Solana). $0.05 USDC.

Parameters* required

question*string

A yes/no question for the oracle.

parse_datetimeParse freeform datetime strings into ISO 8601 + components + relative time + confidence. $0.001 USDC.3 params

Parse freeform datetime strings into ISO 8601 + components + relative time + confidence. $0.001 USDC.

Parameters* required

base_timevalue

ISO 8601 reference; defaults to now UTC.

input*string

Freeform datetime string in any format.

timezonestring

IANA tz name (e.g. 'America/New_York').default: UTC

resolve_nameCross-chain name resolution: ENS (.eth) and Bonfida SNS (.sol). Returns resolved address(es). 1h cache. $0.001 USDC.1 params

Cross-chain name resolution: ENS (.eth) and Bonfida SNS (.sol). Returns resolved address(es). 1h cache. $0.001 USDC.

Parameters* required

name*string

Human-readable name, e.g. 'vitalik.eth' or 'bonfida.sol'. ENS (.eth) and Bonfida SNS (.sol) are supported.

roast_targetWitty roast of any target — wallet, tweet, idea, code, anything. $0.05 USDC.1 params

Witty roast of any target — wallet, tweet, idea, code, anything. $0.05 USDC.

Parameters* required

target*string

Anything to roast: wallet, tweet, idea, code, etc.

roll_randomVerifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.5 params

Verifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.

Parameters* required

commitmentvalue

Optional 32-byte hex pre-commitment from the caller. Included in the signed payload, so the server cannot have chosen the result after seeing the caller's downstream intent.

countinteger

How many integers to sample. 1-100.default: 1

high*integer

Inclusive high bound. Must be >= low.

labelvalue

Optional caller-defined tag (e.g. 'treasure_drop_42'). Included verbatim in the signed payload.

low*integer

Inclusive low bound of the integer range.

screen_walletWallet risk pre-flight for agent payments: OFAC SDN sanctions plus address-reputation (drainer, phishing, mixer, laundering) resolved to an allow/review/block recommendation with per-signal detail. $0.005 USDC.1 params

Wallet risk pre-flight for agent payments: OFAC SDN sanctions plus address-reputation (drainer, phishing, mixer, laundering) resolved to an allow/review/block recommendation with per-signal detail. $0.005 USDC.

Parameters* required

wallet*string

EVM 0x… address (40 hex) or Solana base58 pubkey.

tldr_textSummarize a URL or pasted text into 3-5 concise bullets. $0.01 USDC.2 params

Summarize a URL or pasted text into 3-5 concise bullets. $0.01 USDC.

Parameters* required

textvalue

Pasted text to summarize. Provide either text or url.

urlvalue

URL to fetch and summarize. Provide either text or url.

token_priceUSD spot price for any major token. By symbol or chain+contract. CoinGecko-backed, 60s cache. $0.001 USDC.3 params

USD spot price for any major token. By symbol or chain+contract. CoinGecko-backed, 60s cache. $0.001 USDC.

Parameters* required

chainvalue

Chain slug: base, ethereum, solana, polygon, arbitrum, optimism, bsc, avalanche. Use with contract.

contractvalue

Token contract address. Requires chain.

symbolvalue

Token symbol like 'ETH', 'BTC', 'SOL', 'USDC'. Mutually exclusive with chain+contract.

Configuration

ANCHOR_WALLET_PRIVATE_KEY*secret

EVM private key (0x-prefixed hex). The wallet pays for x402 calls in USDC on Base mainnet. Fund with USDC before use.

Readme

anchor-x402-mcp

MCP server exposing 14 anchor-x402 services as tools any Claude Desktop / Cursor / Codex / Continue agent can call. Pay-per-use USDC via x402 on Base mainnet — no API keys, no subscriptions.

Two transports — pick by who holds the wallet key

This package (stdio) needs a funded EVM private key in the local process (ANCHOR_WALLET_PRIVATE_KEY) and pays for each call on your behalf. Convenient, but you are handing a hot key to a process.

Streamable HTTP — POST https://api.anchor-x402.com/mcp — needs no install and no key handover. It exposes all 18 services (four more than this package: roll_random, investigate_wallet, ledger_summary, ledger_report), and you pay per call with a PAYMENT-SIGNATURE header, so your key never leaves your side.

{
  "mcpServers": {
    "anchor-x402": { "url": "https://api.anchor-x402.com/mcp" }
  }
}

Clients that speak remote MCP natively take the url form above. For one that only launches stdio processes, bridge it:

View the full README on GitHub

Details

Repository: github.com/hypeprinter007-stack/anchor-x402-mcp
Website: anchor-x402.com
Category: AI & LLM Tools
Package: anchor-x402-mcp
Transport: STDIO, HTTP
Auth: Required
Registry: MCP registry, active
Tools verified: Nov 6, 2026

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Anchor X402

Install

Tools

Configuration

Readme

anchor-x402-mcp

Two transports — pick by who holds the wallet key

Details

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