CoinGecko x402 API vs Yield.xyz MCP server

CoinGecko x402 API 72

OpenAPI 3.0.0 'CoinGecko Pro API' at docs.coingecko.com/openapi-specs/pro-api.json, 104 paths on 1 November, none under /x402/ and only 200 responses, so the contract describes the keyed paths the x402 ones mirror, not the x402 surface itself (15 of 25). llms.txt at docs.coingecko.com with Markdown twins of every page (10). The x402 page is short and the endpoint references say what each call returns but rarely when not to use it (12 of 20). Typed parameters with enums and required flags, for example include_tokens and precision on simple price (12 of 15). Request examples on the x402 page and a 200 example per endpoint. Error codes sit on one shared page and none are in the spec (8 of 15). Versioned /api/v3 paths and a dated changelog (15).

Yield.xyz MCP server 95

22 tools read from tools/list with JSON Schema inputs and 14 enums (25). llms.txt (10). Descriptions with order of use, such as yields_get before actions_enter (18 of 20). Typed inputs with enums, ranges and defaults (15). A tool reference with inputs and returns for every tool (12 of 15). Weekly dated product changelog (15). 25 + 10 + 18 + 15 + 12 + 15 = 95.

CoinGecko x402 API 82

Newest changelog entry 2026-10-30, a notice that derivatives open interest moves to single-sided reporting on 10 November (30). Over twenty dated entries since 3 August, including the 26 October x402 price and network change, well over three in 90 days (20). Public changelog and a support address. We didn't test how fast support answers (10 of 15). TypeScript SDK v8.3.1 on 2026-10-27 and Python SDK v4.3.0, neither covering x402 (12 of 15). The SDK repo runs CI and release-please, with releases every two to three weeks (10).

Yield.xyz MCP server 60

Weekly changelog entries into November 2026 (30). More than three dated entries in 90 days (20). Docs, a trust page and support; issues not public (10 of 15). Not found in our import of the official registry (0). No package health read (0). 30 + 20 + 10 + 0 + 0 = 60. Registry presence read from Anchor Terminal's own daily import of the official MCP registry (/api/v1/registry.json, 6 November 2026), not the registry's API.

CoinGecko x402 API 61

Simple price returns only the extras you switch on with include_* flags, and the reference allows up to 515 ids a call. The on-chain endpoints have no field selection (15 of 25). Page and duration parameters on trending pools and search, no cursor on the x402 set (12 of 20). Eight error codes with one-line meanings, and the 402 challenge is machine-readable (12 of 20). Every call is a GET, but the docs don't say whether a retried or failed paid call is charged (10 of 20). One required parameter on simple price. Official TypeScript and Python SDKs exist but don't cover the /x402/ paths (12 of 15).

Yield.xyz MCP server 82

22 tools, about 61 KB (15). limit and offset with documented ranges (20). 429 and the x402 gate documented (15 of 20). All 22 annotated, 18 read-only; transactions unsigned (20). Optional inputs default sensibly; SDKs listed in the docs (12 of 15). 15 + 20 + 15 + 20 + 12 = 82.

CoinGecko x402 API 74

Closed service under API terms last updated 5 September 2025, licensor Gecko Labs Pte. Ltd. of Singapore, per the 1 October check (www.coingecko.com answered 403 on 1 November). The SDKs are Apache-2.0 (15). Privacy policy updated 31 July 2026 links a subprocessor list at trust.coingecko.com, per the 1 October check. Retention is 'as long as you still use' the service and then for legal and audit purposes, with no periods in days (20 of 30). The changelog dates its breaking changes and gave 11 days' notice of the 10 November open interest change, but the 28 August removal of community_data and developer_data got 14 days' notice, the terms allow changes 'without any notice', and the x402 page still warns that pricing and availability 'may change without notice' (10 of 20). Singapore named as the primary location with a linked subprocessor list we didn't open (15 of 20).

Yield.xyz MCP server 53

Closed service under terms with Omni Ltd. dba Yield.xyz, a Bermuda company (15). Privacy policy read; retention not given in periods (12 of 30). Status notices with dates for protocol pauses; no deprecation policy for the API (8 of 20). Subprocessors not found (5 of 20). 15 + 12 + 8 + 5 = 40.

CoinGecko x402 API 60

Status page at status.coingecko.com (StatusHQ) with Pro API, Public API and GeckoTerminal API components and incidents back to January 2023 (20). One incident in the 90 days to 1 November. On 21 October some /onchain requests returned 500 errors for 48 minutes (from 15:40 +08) and three on-chain WebSocket channels were delayed, which the page marks a minor incident, with all other endpoints operational. Four of the five x402 endpoints sit under /onchain. Partial and labelled minor, so minor only (20, was 30 with a clean window on 1 October). Plan rate limits are published (100 a minute on Demo, 300 to 1,000 on paid plans) per the 1 October check, but none for the x402 endpoints (5 of 15). The errors page lists 429 as rate limit exceeded with no Retry-After or backoff guidance, re-read on 1 November (5 of 15). The Enterprise plan carries a 99.9% uptime SLA, per the 1 October check (10). The x402 endpoints are still labelled experimental (0). 20+20+5+5+10+0 = 60.

Yield.xyz MCP server 65

Status page at status.yield.xyz, all services online, with a notice on protocol-level Aave pauses (20). History not read (5). Plan rate limits with headers documented, and the MCP free quotas published with numbers (15). 429 with retry-after and a retry strategy documented; transactions are built unsigned and never broadcast (15). No SLA read (0). Not labelled beta (10). 20 + 5 + 15 + 15 + 0 + 10 = 65.