Eclipse Strike MCP

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Eclipse Strike — the Coinbase exchange adapter: the price at which a trade executes, normalized into the suite's one book.

Wrap posture — read this before expecting account tools

Coinbase ships three official MCPs of its own (spec §10.1): a remote Coinbase MCP for account trading, a Wallet MCP (self-custody — the DeFi suite's concern, not this one's), and a CDP MCP for builders. Strike does not re-implement any of them.

• Strike at M0 is the public-DATA adapter: a thin client over Coinbase's public market-data shapes — products and level-2 books — deterministic, cacheable, and requiring no account session. Suite T0 should never need the owner's credentials.

• Account paths are M1+, and they are a governed WRAP of the vendor's account MCP — subsetting, drift-halt, receipts (the Orbit precedent) — fronted by the Book core's placement gate. They are not in this build.

• One chapter, one upstream: Strike's capability record names exactly the public data surface. Tools arriving from the vendor's account/wallet/CDP surfaces are out-of-scope here and refused; venue_status states account_surface: ABSENT — M1+ governed wrap on every call.

So: no account tools exist in this build — no balances, no orders, no transfers, no key management. The denylist (account_get, accounts_list, balance_get, place_order, withdraw, create_api_key, …) is stated in code and refused by name (-32602).

Related MCP server: Coinbase MCP Server

Status — honest labels

v0.1.0, phase M0 (public-data adapter). Local stdio transport, Python stdlib only. Reads run against fixtures shaped like the real Coinbase public product/book responses, behind a transport seam (load_fixtures()); live public reads are a later verification step, labeled not_tested in the manifest. No accounts, no keys, no network calls, and no certification claimed — bench pending. Own suites: 8/8 tests + stdio smoke passing.

What it does

• Products → canonical Instruments: Coinbase product ids become Book-core SPOT instruments. A native status the core vocabulary doesn't map (the fixture's pending_review) surfaces as UNMAPPED with the native string preserved — never coerced (spec §5.2).

• Level-2 books → canonical Books: the [price, size, orders] arrays translate through the same core builder Forecast's CLOB parser uses. Cross-adapter parity — same logical book in, same canonical book and quote math out, modulo venue fields — is a tested property of the suite, not an aspiration.

• Quotes with fee truth: all-in buy/sell cost from Coinbase's dated fee schedule (account-specific tiers supersede the public schedule at M1 and will be labeled as such). A stale schedule degrades the quote to FEE_UNVERIFIED (§5.3).

Tools (6)

product_list · product_get · book_get · quote_get · venue_status · receipt_list

Spec: ~/workspace/cyan-eclipse/eclipse-markets-suite-spec-20261025.md (§10.1). Suite core: Eclipse Book. Derivatives and Coinbase's equities surface are out of the v1 scope (§8.1; equities live in the Tape chapter). This is data and tooling, not financial advice.

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