Coinbase MCP server (Coinbase for Agents) vs Gemini Exchange API

Coinbase MCP server (Coinbase for Agents) 58

Read as a closed hosted service. The last dated change to the server in the CDP changelog is US stocks on 21 August 2026; the docs added three x402 tools in October (the overview of 2 October still calls them coming soon, the MCP page was modified on 9 October) and the setup guide on 22 October, with no changelog entry. Judgement call (25 of 30). Changelog entries for futures (17 August) and stocks (21 August) both name the MCP server, and the CLI built from the same agent spec shipped six versions from 14 August to 30 September (20). A public changelog, a CDP Discord for integration help and a one-way feedback tool limited to six notes a day, none tested (10 of 25). Not in the official MCP registry; a search for coinbase on 24 October found only third-party servers (0). The CLI has no runtime dependencies but runs a postinstall script and has no public repository or CI (3 of 10).

Gemini Exchange API 88

Read as a closed hosted service with an open repository. The revision history's latest entry is 28 October 2026 and the repository was pushed on 5 October (30). Thirteen dated entries between 2 September and 28 October 2026 (20). The nine open items on the repository are all pull requests with replies, Dependabot included, and the docs name trading@gemini.com for developer support; no public issue tracker was tested (15 of 25). Not in the official MCP registry, but current official SDKs, TypeScript 0.1.1 of 23 September and Go 0.1.0 of 29 August 2026 (15). CI workflows validate and publish both SDKs and the MCP server has tests; dependencies are current (8 of 10). 30 + 20 + 15 + 15 + 8 = 88.

Coinbase MCP server (Coinbase for Agents) 65

No public tool manifest. tools/list answered 401 without a token, so the JSON Schema of the 29 tools couldn't be read. The docs say the tool schemas carry field descriptions and enums, and the companion CLI's bundled command spec types every parameter. Judgement call (10 of 25). llms.txt, a Markdown twin of every docs page and a self-contained setup guide written for agents (10). The docs give one line per tool, and the guide has a routing matrix saying which tools to use or avoid for spot, equities and futures, but the tool descriptions as served weren't read (12 of 20). Enums and constraints are described for sessions, order types and sizes, not verified on the server (8 of 15). Order and x402 examples, and two error tables with cause and fix for 401, 403 Missing required scopes, PERMISSION_DENIED, MISSING_FIELDS, INVALID_VALUE, INVALID_FORMAT and x402 failures (13 of 15). Dated Coinbase for Agents entries in the CDP changelog and a versioned guide (0.2.3), but no server version is published and the October changes have no changelog entry (12 of 15).

Gemini Exchange API 88

OpenAPI 3 for REST (specs/openapi/rest.yaml), AsyncAPI for WebSocket, a prediction-markets OpenAPI file and a specs/index.json catalogue; the MCP server's tools take zod schemas published as JSON Schema (25). llms.txt, llms-full.txt, agents.md, an agent card and an agent skills index (10). Endpoint pages state purpose, the Build an agent guide says what to establish before acting and when to stop, and MCP tool descriptions tell the model when to confirm; the docs don't say when not to use an endpoint (15 of 20). Typed inputs with enums for order types, options and sessions, required fields marked, decimals as strings since 7 July 2026 (12 of 15). Examples throughout, samples in three languages, and an error-codes page with 53 named reasons and their HTTP statuses (14 of 15). A revision history dated from 2015 to 28 October 2026 and versioned paths (v1, v2), but the upcoming-changes page reads "TBD" (12 of 15). 25 + 10 + 15 + 12 + 14 + 12 = 88.

Coinbase MCP server (Coinbase for Agents) 55

Graded with the hosted lines, on the remote server at agents.coinbase.com. status.coinbase.com is a Statuspage site with Advanced Trade, API, US Derivatives and Developer Platform components and 90 days of history, but no component for the agents MCP server, so it shows the trading back end and not the server agents call. Judgement call (10 of 20). Its first history page, 1 August to 24 October 2026, shows minor incidents for derivatives positions and portfolio transfers and one major, a two-minute website slowdown on 14 October, with none for Advanced Trade order entry; 26 to 31 July sits on a second page we didn't read (20). The setup guide says it specifies no numeric request quota for the remote server and that Advanced Trade limits are not the MCP limit (0). It says to honour Retry-After on 429 or back off with jitter, orders take a client_order_id that returns the existing order on retry, and x402 payments take an idempotency_key (15). No SLA found (0). Nothing labels the remote server beta or preview (10).

Gemini Exchange API 73

Read with the hosted lines on the REST API at api.gemini.com. status.gemini.com is a Statuspage site with component history (20). Its Atom feed for 10 September to 3 November 2026 holds 25 entries, mostly scheduled trading and FIX upgrades of 15 to 60 minutes with possible order timeouts, single-network deposit delays, and incorrect perpetual index prices for about 3.5 hours on 15 and 16 October; a 3-hour scheduled eOTC window was planned and outside the core API. Minor only (20). Rate limits with numbers, 120 a minute public and 600 private plus per-endpoint limits (15). 429 is documented but with no Retry-After or backoff guidance, and client order ids are recommended without duplicate rejection, so retries are not safe by contract; the heartbeat cancel is a safety net rather than idempotency (8 of 15). No SLA found (0). Generally available (10). 20 + 20 + 15 + 8 + 0 + 10 = 73.

Coinbase MCP server (Coinbase for Agents) 66

Graded on the remote server. 29 tools per the docs, with no toolsets or read-only subset documented (15). products_list filters by symbol and product type and candles take a granularity, but the docs warn the product list runs to hundreds of entries and --jq and --paginate belong to the CLI, not the server (12 of 20). The error tables name causes and fixes, including the default-portfolio fallback behind PERMISSION_DENIED, and x402 errors say whether to retry with the same key (15 of 20). Client order IDs and x402 idempotency keys make retries safe. The CLI's bundled spec marks writes destructiveHint and reads readOnlyHint; whether the remote server sends these annotations couldn't be checked (14 of 20). Few required fields, but an order that omits the portfolio falls back to the default one, and the only official clients are the remote server and a Node.js CLI (10 of 15).

Gemini Exchange API 79

Graded on the REST API, with the MCP server noted. Order book depth, trade and candle counts can be limited and symbols filtered; the MCP server lists 87 tools with no toolset or read-only subset switch, so a session that loads it pays for all of them (18 of 25). Timestamps, limit_trades, since and per-symbol filters on history, pagination on prediction-market lists (16 of 20). Errors carry a reason and message an agent can branch on, such as InsufficientFunds, MarketNotOpen and MissingRole, though some messages only say to retry later (16 of 20). client_order_id is echoed back but not checked for duplicates, cancel-all-session-orders and the heartbeat limit damage; the MCP server publishes readOnlyHint and destructiveHint on every tool and gates destructive ones on confirm: true (14 of 20). Few required parameters, sensible defaults, and official TypeScript and Go SDKs (15). 18 + 16 + 16 + 14 + 15 = 79.

Coinbase MCP server (Coinbase for Agents) 62

The editorial half. A closed hosted service. The docs carry a disclaimer that the person is responsible for every trade an agent makes, but name no terms for agent access, and the Coinbase User Agreement answered a bot check and wasn't read. The CLI is MIT on npm (10 of 30). Per the coinbase-cdp-agentkit check of 1 October 2026, the privacy policy (updated 27 May 2026) names Coinbase, Inc., lists processing countries and ties retention to need without numbers; nothing specific to MCP calls or the feedback tool's screening was found (12 of 30). No deprecation policy or notice period for the server or its tools (0). Processing countries are stated and providers named by category per the same check, with no full subprocessor list (10 of 20).

Gemini Exchange API 75

The editorial half. A closed service under a user agreement that names its entities by state, with the MCP server and SDKs open under Apache-2.0 (18 of 30). The privacy policy of 11 May 2026 names entities and processing countries, ties retention to need without numbers and names provider categories only, with no DPA or subprocessor list found (16 of 30). The revision history records removals and type changes with dates, but the upcoming-changes page is "TBD" and no notice period is stated (8 of 20). Processing countries are named (US, Ireland, UK, Malta, Singapore, Australia) and providers by category, with no named subprocessors (12 of 20). 18 + 16 + 8 + 12 = 54.

Coinbase MCP server (Coinbase for Agents) 70

Coinbase OAuth with authorisation code and PKCE S256, resource on every request, DCR and CIMD limited to allowlisted clients, ten mcp:* scopes, a consent screen where the person picks portfolios, and revocation under Account > Security > Connections (30). A read-only grant and a funded separate portfolio limit what an agent can touch, and transfers move funds only between the person's portfolios. No per-order size limit or server-side confirmation is documented; the June blog's trade-size limits are still "soon", and the setup guide tells agents to request every scope rather than the least needed (12 of 20). x402 fetch returns third-party data from a curated catalogue only, and the 13 October changelog removes Bazaar resources whose metadata carries prompt-injection risk; no guidance on treating returned data as untrusted was found beyond citing only values the source returns (8 of 15). Orders, transfers and payments appear in the Coinbase account and connections are listed in account settings, but no per-call log for MCP was found (8 of 15). HackerOne bug bounty named in coinbase.com's security.txt, which expired on 1 June 2024; no security.txt on agents.coinbase.com; certifications not read because coinbase.com answered a bot check (12 of 20).

Gemini Exchange API 78

Revocable API keys with one role each (Trader, Fund Manager, Auditor, Administrator), HMAC-SHA384 signing with a nonce, and OAuth 2.0 with scopes, PKCE S256, single-use refresh tokens and RFC 7009 revocation; no IP allow-list documented and no key expiry (28 of 30). Auditor is read-only, a Trader key cannot withdraw, approved withdrawal addresses are a Fund Manager action, and the MCP server refuses funds-moving tools without confirm: true (18 of 20). The MCP server wraps every response in untrusted-output markers, strips control and bidi characters and redacts memos, labels and agreement text; the REST docs say nothing on the subject (13 of 15). Order and transfer history are readable, but no per-key audit log or API access log was found (5 of 15). security.txt with a PGP contact and a bug bounty paying $150 to $20,000, scoped to the sandbox hosts; no certification was read and no public advisory process was found (14 of 20). 28 + 18 + 13 + 5 + 14 = 78.