# Codex vs Yield.xyz MCP server (slim)

> Codex scores 75.4 (BB) to Yield.xyz's 74 (BB) for crypto market data. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/codex-graphql-vs-yield-xyz-mcp.md (~3,700 tokens) · this version ~2,180 tokens · JSON https://www.anchorterminal.com/compare/codex-graphql-vs-yield-xyz-mcp.json · canonical https://www.anchorterminal.com/compare/codex-graphql-vs-yield-xyz-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Codex scores 75.4 (BB) on agent readiness against Yield.xyz MCP server's 74 (BB), and leads in 3 of 7 scored categories. Yield.xyz MCP server leads on security & auth and payments & pricing. Both do crypto market data. Yield.xyz MCP server accepts x402. Codex doesn't.

- Codex: BB 75.4, rank #64 of 1510 · https://www.anchorterminal.com/tools/codex-graphql.min.md
- Yield.xyz MCP server: BB 74, rank #97 of 1510 · https://www.anchorterminal.com/tools/yield-xyz-mcp.min.md
- Codex, good for On-chain token prices, charts, holders, wallet PnL, launchpad streams and Polymarket and Kalshi data for trading agents and crypto apps. Ahead on Reliability, 85 against 65; Maintenance & community, 80 against 60; Transparency & trust, 59 against 53.
- Yield.xyz MCP server, good for Agents and wallets that need to find, compare and enter staking or DeFi yields, paying per call over x402 if they like. Ahead on Security & auth, 56 against 49; Payments & pricing, 100 against 80. Also An agent can pay per call over x402, with no account.

| Category | Codex | Yield.xyz MCP server |
| --- | --- | --- |
| Reliability (16%) | 85 | 65 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 91 | 95 |
| Agent ergonomics (13%) | 79 | 82 |
| Security & auth (14%) | 49 | 56 |
| Payments & pricing (10%) | 80 | 100 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 80 | 60 |
| Transparency & trust (7%) | 59 | 53 |

| Fact (where they differ) | Codex | Yield.xyz MCP server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Codex Data Inc. | Omni Ltd. (Yield.xyz) |
| Hosted endpoint | `https://graph.codex.io/graphql` | `https://mcp.yield.xyz/mcp` |
| Transports | HTTP, websocket | Streamable HTTP |
| Auth | API key | OAuth or key |
| x402 | no | yes, from $0.001/call |
| Licence | Proprietary service under Codex Data Inc.'s terms of service. The TypeScript SDK is MIT | none |
| Tools exposed | 0 | 22 |
| Last release | 2026-11-02 | none |
| Terms last updated | 2026-10-29 | not read yet |
| Privacy policy last updated | 2026-09-29 | not read yet |
| Customer content may train models | not found in the text | not read yet |
| Terms restrict automated access | yes | not read yet |
| Terms restrict benchmarking | not found in the text | not read yet |
| Terms or service can change without notice | yes | not read yet |
| Arbitration or class-action waiver | yes | not read yet |
| Popularity | 75k npm/wk | none |

Why the edge:
- Reliability, Codex +20: Codex 85 (Hosted lines. Status page at status.codex.io (incident.io) with API, Dashboard and 25 network components and a history page (20). The history from 8 August to 6 November lists an elevated-latency incident on 11 August (balances queries, 42 minutes, labelled degraded performance), a 5xx spike the same day, degraded filterTokens on 12 August, and network delays on Robinhood, BNB, Cronos, Fogo and Solana pricing in late August and September, with none in October or November. All read as partial or degraded, so minor only (20). Per-plan rate limits (5 a second free, 300 on Growth with a 500 burst) and per-request maxima are published (15). 429 TOO_MANY_REQUESTS carries `retryAfterSeconds` and `Retry-After`, OVER_CAPACITY says to wait 30 seconds, and the errors page says which codes to retry; writes are limited to webhook and token mutations (15). The pricing page shows '99.9% Uptime SLA' as a headline figure and custom SLAs on Enterprise, with no SLA document found (5 of 10). The API is generally available (10). 20+20+15+15+5+10 = 85.); 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.)
- Payments & pricing, Yield.xyz MCP server +20: Codex 80 (MPP (Machine Payments Protocol) on every query endpoint, paid in USDC on Tempo; subscriptions and webhooks are not covered, and it is not x402 (35 of 40). $0.001 a query through MPP, compute-unit costs per operation, and Growth at $120 per million compute units, all public (20). The Almost free plan's 10,000 compute units need a one-time $1 activation fee by card or 1 USDC, which the terms say confirms a payment method (5 of 20). An agent can pay per query with no account or key (20). 35+20+5+20 = 80.); Yield.xyz MCP server 100 (x402 on its own MCP endpoint for metered tools over quota (40). $0.001 a call published, with machine-readable pricing at /.well-known/x402 (20). 1,000 free read calls a tool a day with no sign-up (20). Keyless use and x402 let an agent start with no person (20). 40 + 20 + 20 + 20 = 100.)
- Maintenance & community, Codex +20: Codex 80 (Closed service. Newest changelog entry 2 November 2026 (30). Weekly entries from 3 August to 2 November, and SDK releases 2.5.10 to 2.5.20 between 28 October and 5 November (20). Public changelog, a Discord, a support address and a status page with a report link; GitHub issue replies were not sampled (10 of 15). Current official TypeScript SDK, no other languages (12 of 15). The SDK repository runs lint and test on pull requests and a release workflow (8 of 10). 30+20+10+12+8 = 80.); 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.)
- Security & auth, Yield.xyz MCP server +7: Codex 49 (Secret API keys in a header, never in the URL. Short-lived tokens from `createApiTokens` with an expiry and a request limit, per-key compute-unit limits and key deactivation. No scopes (22 of 30). The surface is mostly reads; mutations create webhooks and short-lived tokens. No read-only key (12 of 20). Token names, symbols, social links and community notes come from token deployers and other sources, and the docs warn tokens may be scams, with no prompt-injection guidance (5 of 15). The dashboard usage page breaks compute units down by operation, `apiUsage` reports the period's use and `usageData` the cost of each request (10 of 15). security.txt returns 404, and no disclosure policy, bug bounty or certification was found on the site or docs (0 of 20). 22+12+5+10+0 = 49.); Yield.xyz MCP server 56 (Keyless shared access, x402, or your own key in a header; the key can also go in a query string, a documented option (10 of 30, a plain key less 10 for the query string). Mostly reads, and wallet tools build unsigned transactions the user signs elsewhere (18 of 20). Returns protocol data, no third-party prose (10). No audit log of MCP calls (0). SOC 2 Type II, penetration tests by Spearbit/Cantina and Trail of Bits, audited contracts (18 of 20). 10 + 18 + 10 + 0 + 18 = 56.)
- Transparency & trust, Codex +6: Codex 59 (Closed service under terms that name Codex Data Inc., last updated 29 October 2026; the SDK is MIT (15 of 30). The privacy policy (effective 29 September 2026) is general, keeps data 'only for as long as is necessary' with no periods, transfers data to the United States, and links no DPA or subprocessor list (10 of 30). The changelog dates deprecations, such as NFT endpoints removed on 31 March 2026 and the transactions fields deprecated on 2 November, with no written deprecation policy or notice period (12 of 20). The terms name Mixpanel, Rollbar and Sentry and the privacy policy says data is processed in the United States; no fuller subprocessor list found (8 of 20). 15+10+12+8 = 45.); 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.)