C
Emerging
74/100
2 months ago

thebuyside-x402-agent

The MCP gateway that lets any AI agent discover and pay metered APIs on Base or Solana — without the user wiring payments themselves.

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

Code Verified⚡ Live Monitored: not connected

Verified is a snapshot. Live keeps it current, and builds your track record.

⚡ Connect GitHub → continuous verification on every pushwhy connect →

Who stands behind it

jaysperspective

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

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// key findings
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 2 credentials: X402_PAYER_PRIVATE_KEY, X402_PAYER_SOLANA_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configX402_AGENTIC_URLapi.agentic.market/v1/services/search agentic.market endpoint override
configX402_ALLOWLISThosts in seed.json Comma-separated allowed hostnames (replaces default)
configX402_ALLOW_UNVERIFIED(off) 1 allows any host — dev only
configX402_BAZAAR_URLapi.cdp.coinbase.com/platform/v2/x402/discovery/search CDP Bazaar endpoint override
configX402_CONFIRM_STRICT(off) 1 refuses payment when the client lacks elicitation OR advertises elicitation but lacks tasks/create (e.g. Claude Code as of 2026-05). Default: log a one-time warning and proceed
configX402_DAILY_LIMIT1.00 Max USDC spent per rolling 24h window
configX402_DIRECTORY_URL
configX402_DISABLE_402DIRECTORY
configX402_DISABLE_AGENTIC(off) 1 skips agentic.market
configX402_DISABLE_BAZAAR(off) 1 skips CDP Bazaar
configX402_DISABLE_X402WATCH(off) 1 skips x402watch
configX402_FEDERATIONon off disables all external indexes; discover returns local-only results
configX402_FEDERATION_TIMEOUT_MS1500 Per-source timeout. A slow source produces zero entries (and a warning), never blocks discover
configX402_KILL_SWITCH
configX402_MPP_ALLOW_NON_MAINNET
configX402_MPP_DEBUG
🔐 secretX402_PAYER_PRIVATE_KEYexport =0x...
🔐 secretX402_PAYER_SOLANA_KEYexport =<base58 secret key>
configX402_PER_CALL_LIMIT0.05 Max USDC per single call
configX402_RECEIPTS_PATH.local/receipts.jsonl Where the receipts log is written
configX402_REQUIRE_CONFIRMalways always, never, or a USDC threshold (e.g. 0.01). Asks the user to approve via MCP elicitation before signing
configX402_SOLANA_RPCapi.mainnet-beta.solana.com Solana RPC for fetching a recent blockhash at sign time
configX402_TEST_MPP_URL
configX402_TEST_URLnews-ep stories Override target for pnpm pay-newsep and pnpm pay-solana
configX402_X402WATCH_URLGitHub raw snapshot URL x402watch daily snapshot URL (the {date} placeholder is filled at request time)
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

3/3 tools missing one or more hints — pay.discover (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pay.fetch (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); pay.wallet_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint). OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool inputs are validated

2/3 tool handlers declare input schemas (67%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

2/3 tool handlers wrap calls in try/catch (67%)

Wrap each tool handler body in try/catch and return a structured error response.

Tool test coverage

Only 0/3 tools referenced in tests (0%)

Write tests that reference each tool by name so every tool has at least one test.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/jaysperspective-thebuyside-x402-agent-17omqs)](https://m8ven.ai/mcp/jaysperspective-thebuyside-x402-agent-17omqs)
Shows your grade and updates automatically. Prefer no grade? Append ?variant=verified to the badge URL.
commit: 66748867a0390aa7593e1b23d775965e1381c675
code hash: afe57ec84e4975b1f564cff2650045a86b0ee3d4ac3d29e94c772e7a982405b6
verified: 6/13/2026, 10:28:48 AM
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