syntax_preflight — x402 checks MCP Tool
syntax_preflight
(syntax preflight) is one of 58 tools on the
x402 checks
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call syntax_preflight from your client
- Claude Code x402 checks syntax_preflight run in your project directory
- Claude Desktop x402 checks syntax_preflight ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor x402 checks syntax_preflight ~/.cursor/mcp.json
- VS Code x402 checks syntax_preflight .vscode/mcp.json
- Zed x402 checks syntax_preflight ~/.config/zed/settings.json
- Windsurf x402 checks syntax_preflight ~/.codeium/windsurf/mcp_config.json
- Cline x402 checks syntax_preflight ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI x402 checks syntax_preflight ~/.gemini/settings.json
- Grok x402 checks syntax_preflight .mcp.json (in your project root)
- ChatGPT x402 checks syntax_preflight Settings → Connectors → Advanced → Developer mode
- Claude.ai x402 checks syntax_preflight Settings → Connectors → Add custom connector
- LangChain x402 checks syntax_preflight pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http x402-checks https://api.code402.dev/mcpOther tools on this server
- crypto_ticker
- erc20_balance
- fx_spot_price_oracle
- block_info
- tx_activity
- token_contract_risk
- clean_markdown_scraper
- context_distill
- instant_json_schema_verifier
- balance_check
- calculate_fx_savings
- counterparty_live_dossier
- lei_live_lookup
- vat_vies_live_lookup
- uk_company_live_lookup
- iso20022_cbpr_cure
- iban_check
- lei_check
- vat_mod97_check
- swift_bic_check
- batch_validate
- vendor_onboarding_pack
- india_supplier_check
- pre_disbursement_guard
- gstin_check
- ifsc_check
- sanctions_address_screen
- company_number_format
- aba_routing_check
- ein_format_check
- abn_check
- cnpj_check
- uscc_check
- japan_corp_check
- kra_pin_check
- rfc_check
- upi_vpa_check
- uae_trn_check
- china_supplier_check
- japan_supplier_check
- latam_supplier_check
- gulf_supplier_check
- africa_supplier_check
- rent_deposit_guard
- rental_listing_risk
- rental_verdict
- reconcile
- create_b2b_invoice
- get_b2b_invoice
- simulate_spend_sentinel
- aci_trust_lookup
- csp_commitment_create
- iso20022_validate
- iso20022_to_x402_intent
- counterparty_passport_verify
- check_price
- receipt_verify
This list was read from the server itself, by connecting to it and calling tools/list on 14 November 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.