x402 Tools

OpenDexter exposes five tools that cover the full lifecycle from search to settlement:

Tool	Purpose
`x402_search`	Search the marketplace for paid resources by keyword, category, or chain
`x402_check`	Preview pricing and requirements before committing to payment
`x402_wallet`	Create or inspect wallet/session funding addresses
`x402_fetch`	Pay for and receive the response in one call
`x402_pay`	Explicit payment verb when the client wants to separate pay from fetch

The Flow

flowchart LR
    Search["x402_search"] --> Check["x402_check"]
    Check --> Wallet["x402_wallet"]
    Wallet --> Fetch["x402_fetch"]
    Fetch --> Data["Response data"]

Discover — x402_search turns the marketplace into an agent-readable interface
Evaluate — x402_check shows pricing, chain, and requirements before you commit
Fund and execute — x402_wallet gets your addresses, then x402_fetch handles payment and retrieval

Hosted Session Model

In the hosted flow at open.dexter.cash/mcp:

x402_wallet creates a session with two funding addresses (one Solana, one shared EVM)
Fund either address with USDC
x402_fetch auto-selects the best-funded chain the endpoint accepts
Sessions persist for 30 days

Attribute	Value
Auth	None
Wallets	Ephemeral session (Solana + EVM)
Multi-chain	Auto-selects from funded chains
Session lifetime	30 days
Best for	ChatGPT, Claude, hosted agents

Local npm Package

With @dexterai/opendexter installed locally:

Signer lives at ~/.dexterai-mcp/wallet.json
Fund it directly — wallet persists indefinitely
Same five tools, same flow

Attribute	Value
Auth	None
Wallet	Persistent local signer
Chains	Solana (local key)
Session lifetime	Indefinite
Best for	Cursor, Codex, CLI agents

The authenticated MCP at mcp.dexter.cash/mcp can also expose the x402 tool surface. Set TOKEN_AI_MCP_PROFILE=opendexter to limit it to the focused x402 flow instead of the broader Dexter tool catalog.

x402 Tools

The Flow

Hosted Session Model

Local npm Package

Authenticated Dexter MCP

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