feat: add MainStreet action provider (onchain-verifiable reputation check)

[philpof102-svg]

What

Adds a MainStreet action provider — a pre-payment reputation check for Base counterparties.

check_reputation(address) returns a SAFE / CAUTION / BLOCK verdict + 0–100 score for any Base wallet, agent, or token, so an agent can refuse to pay a BLOCK-rated or unscored counterparty before it transacts (e.g. before an x402 settlement). Pairs naturally with the existing x402 and erc8004 providers.

MainStreet is an onchain reputation oracle on Base: each verdict is an EIP-712-signed attestation, verifiable onchain against the MainStreetVerifier contract (0x7397adb9713934c36d22aa54b4dbbcd70263592b) — the signal is checkable, not "trust us". Free read API (100 checks/day/IP), fully open source.

Implementation

• Read-only HTTP API provider, same shape as defillama / messari (no wallet/config required; network-agnostic).
• Safe default: an unknown / unscored address maps to CAUTION, never auto-"OK" — a reputation gate must not green-light a no-history wallet.
• Includes: provider + zod schema + index.ts + provider README, registration in action-providers/index.ts, an entry in the package README, unit tests (mock fetch, covering SAFE / BLOCK / unknown / HTTP error / network error / supportsNetwork), and a changeset.

Links

• npm: @raskhaaa/mainstreet-oracle · repo: github.com/philpof102-svg/mainstreet
• Hosted MCP: claude mcp add --transport http mainstreet https://avisradar-production.up.railway.app/mcp

[cb-heimdall]

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