# ReqRes MCP server vs Snowflake-managed MCP server

> Snowflake-managed scores 52.7 (D) to ReqRes's 48.8 (D) for databases. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/reqres-mcp-vs-snowflake-managed
- Markdown: https://www.anchorterminal.com/compare/reqres-mcp-vs-snowflake-managed.md (~4,450 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

Snowflake-managed MCP server scores 52.7 (D) on agent readiness against ReqRes MCP server's 48.8 (D), and leads in 3 of 7 scored categories. ReqRes MCP server leads on agent ergonomics, payments & pricing and maintenance & community. Both do databases.

- ReqRes MCP server: grade D, 48.8/100, rank #1114 of 1510. Markdown https://www.anchorterminal.com/tools/reqres-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/reqres-mcp.json
- Snowflake-managed MCP server: grade D, 52.7/100, rank #978 of 1510. Markdown https://www.anchorterminal.com/tools/snowflake-managed.md · JSON https://www.anchorterminal.com/api/v1/tools/snowflake-managed.json
- Best database, file and memory tools for AI agents: https://www.anchorterminal.com/best/data/index.md
- All 111 databases comparisons: https://www.anchorterminal.com/compare/data/index.md

## Which one, for what

### ReqRes MCP server (D)

Good for: Coding agents that need a throwaway or starter backend for a prototype, with no account to set up.

Ahead on:
- Agent ergonomics, 76 against 46
- Payments & pricing, 50 against 35
- Maintenance & community, 50 against 35

Also in its favour:
- No key needed to call it
- A hosted endpoint, with nothing to install
- No incidents deducted, where Snowflake-managed MCP server loses 3 points for them

Watch for: A sponsored line in every successful result unless ?sponsor=0

### Snowflake-managed MCP server (D)

Good for: A company that already keeps its data in Snowflake and wants outside MCP clients to query it under existing roles, best through one Cortex Agent tool.

Ahead on:
- Reliability, 50 against 30
- Security & auth, 77 against 33
- Transparency & trust, 84 against 47

Watch for: No rate limits for the MCP endpoint and no JSON-RPC error codes were found in the reviewed documentation


## Why the edge

### Security & auth: Snowflake-managed MCP server +44

- ReqRes MCP server (33): No credential to start, and project keys returned by the tool (15 of 30). Writes on the agent's own project only (12 of 20). Every successful result ends with a sponsored message, labelled and 'never written as an instruction', which still puts third-party text in the model's context (3 of 15). No audit log (0). No security programme found (3 of 20). 15 + 12 + 3 + 0 + 3 = 33.
- Snowflake-managed MCP server (77): OAuth 2.0 with PKCE, role scopes, an allowed-roles list, binding to an external identity provider and RFC 9728 metadata. Programmatic access tokens expire (15 days by default, 365 at most), can be rotated and need a network policy by default. No dynamic client registration (28). Each tool needs its own grant, the SQL tool defaults to read-only, and the docs advise a separate least-privileged server for direct SQL. No confirmation step for writes is documented (15). The docs warn about tool poisoning, tool shadowing and recursive loops and cap recursion at 10. Nothing covers instructions arriving in query or search results (6). Account Usage has query, login and access history and a Cortex Agent usage view. No log of MCP tool calls was found (10). security.txt valid to 17 August 2027 with a HackerOne policy, SOC 2 Type II, ISO 27001, HITRUST and FedRAMP per the Security Addendum. The HackerOne page was not read (18). Per the 9 October check, not re-read on 4 November.

### Transparency & trust: Snowflake-managed MCP server +37

- ReqRes MCP server (47): Closed service under readable terms; operating company not named in the parts read (10 of 30). You own your data, unclaimed agent projects are deleted after 72 hours, and the terms say the free service can end with reasonable notice (22 of 30). That notice clause and the 72-hour rule are dated commitments (10 of 20). Subprocessors not found (5 of 20). 10 + 22 + 10 + 5 = 47.
- Snowflake-managed MCP server (84): Closed service with clear published terms, an acceptable use policy and a consumption table (15). A DPA and Security Addendum of 11 January 2026 with 72-hour incident notice and customer-chosen regions. The DPA says leftover data is deleted promptly after termination without a day count, and the Privacy Notice excludes Customer Data (22). A written behaviour change policy with an eight-week bundle period and dated notes, though the August 2026 MCP change shipped outside it (15). Four sub-processors and 28 affiliates listed with locations and 28 days' notice of additions. AI model providers are not named on the list (16). Per the 9 October check, not re-read on 4 November.

### Agent ergonomics: ReqRes MCP server +30

- ReqRes MCP server (76): Seven compact tools (25). list_records is paginated (15 of 20). No documented errors (3 of 20). Annotated, two read-only, and delete_record marked (18 of 20). No key needed and a plain REST API behind it (15). 25 + 15 + 3 + 18 + 15 = 76.
- Snowflake-managed MCP server (46): The tool list is whatever the operator declares, up to 50 a server, and Snowflake recommends one Cortex Agent tool per server with further servers for other uses (18). The search tool takes `columns` and `limit`. SQL and custom tool responses are cut at 250 KB with no paging, and agent tool responses carry every intermediate step and can pass 200 KB (8). Errors are documented as a symptom table, and `invalid_client` covers both wrong credentials and a network policy block (6). The SQL tool is read-only by default. No `readOnlyHint` or `destructiveHint` annotations and no idempotency support are documented (6). Few required arguments and standard MCP clients work with no SDK, but each client needs a hand-made OAuth integration and some clients can't choose a role (8). Per the 9 October check, not re-read on 4 November.

### Reliability: Snowflake-managed MCP server +20

- ReqRes MCP server (30): status.reqres.in wasn't reachable (0). No history (5). Free-plan limits published with numbers (250 requests a day, 3 collections, 100 records) (15). No retry guidance (0). No SLA found (0). Not labelled beta (10). 0 + 5 + 15 + 0 + 0 + 10 = 30.
- Snowflake-managed MCP server (50): Graded as a hosted service. Snowflake's site terms (14 April 2025) bar robots, spiders and scrapers on snowflake.com, so the docs, the status page and www.snowflake.com were not re-read on 4 November and the 9 October readings stand. Statuspage at status.snowflake.com with components by cloud region, and no component for Cortex or the MCP server was recorded (15, the value for a vendor status page with no component for the product). Only the front page's 15 days to 9 October were read, with two incidents marked critical (one region for 68 minutes on 25 September 2026, other regions for 35 minutes on 27 September), one marked major (Snowsight connectivity, 6 October) and one minor (8 October). The rest of the window from 6 August is unread and gets no credit, so the incident line is held at the recorded 10. No rate limit for the MCP endpoint found (0). The REST API's OpenAPI files describe 429 and retry with backoff, but the MCP page gives no retry or idempotency guidance (5, partial value held). 99.9 per cent monthly SLA with service credits (10). Generally available since 4 November 2025 (10). 15+10+0+5+10+10 = 50.

### Payments & pricing: ReqRes MCP server +15

- ReqRes MCP server (50): No machine payment protocol (0). Plan prices public (10). Free plan (20). An agent creates a project with no person (20). 0 + 10 + 20 + 20 = 50.
- Snowflake-managed MCP server (35): No x402, MPP or L402 (0). Per-credit prices by region and edition and per-unit AI rates are public in the Service Consumption Table of 2 October 2026, though the MCP server has no line of its own (20). A 30-day trial needs only an email address, and Cortex tools stay off until a card is added (15). A person signs up in a browser and an administrator creates the server and the OAuth integration (0). Per the 9 October check, not re-read on 4 November.

### Maintenance & community: ReqRes MCP server +15

- ReqRes MCP server (50): Registry entry in.reqres/reqres updated 16 October 2026 (30). No dated releases found (0). Blog and docs; no changelog (5 of 15). Official registry entry under its own namespace (15). No package to read (0). 30 + 0 + 5 + 15 + 0 = 50. 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.
- Snowflake-managed MCP server (35): Per the 9 October check, not re-read on 4 November (snowflake.com's site terms bar robots). The last dated change to the MCP server is the SSE note of 20 August 2026, 76 days before 4 November, and platform release notes ran to 9 October (20). Of the three dated MCP entries recorded (22 July, 7 August and 20 August 2026), two fall in the 90 days from 6 August, and newer entries couldn't be looked for (0, cause time). A public changelog and a support route through cases and the community, whose answers were not sampled (10). The managed server is not in the official MCP registry, which lists only the separate open-source `io.github.Snowflake-Labs/mcp` (0). Nothing to install. The REST API specification repository was last updated on 10 September 2026 (5). 20+0+10+0+5 = 35.

## Score by category

| Category | Weight | ReqRes MCP server | Snowflake-managed MCP server | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 50 | Snowflake-managed MCP server +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 61 | 61 | even |
| Agent ergonomics | 13% (16.2 this run) | 76 | 46 | ReqRes MCP server +30 |
| Security & auth | 14% (17.5 this run) | 33 | 77 | Snowflake-managed MCP server +44 |
| Payments & pricing | 10% (12.5 this run) | 50 | 35 | ReqRes MCP server +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 50 | 35 | ReqRes MCP server +15 |
| Transparency & trust | 7% (8.8 this run) | 47 | 84 | Snowflake-managed MCP server +37 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **48.8 · D** | **52.7 · D** | |

## Facts side by side

| Fact | ReqRes MCP server | Snowflake-managed MCP server |
| --- | --- | --- |
| Kind | MCP server | MCP server |
| Vendor | ReqRes | Snowflake Inc. |
| Hosted endpoint | `https://reqres.in/mcp` | no (local only) |
| Transports | Streamable HTTP | Streamable HTTP |
| Auth | None | OAuth or key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | none | Proprietary service under Snowflake's terms of service |
| Tools exposed | 7 | none |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | `in.reqres/reqres` | not listed |
| Last release | none | 2026-08-20 |
| Terms last updated | not read yet | 2026-04-16 |
| Privacy policy last updated | not read yet | 2026-07-01 |
| Customer content may train models | not read yet | not found in the text |
| Terms restrict automated access | not read yet | not found in the text |
| Terms restrict benchmarking | not read yet | not found in the text |
| Terms or service can change without notice | not read yet | not found in the text |
| Arbitration or class-action waiver | not read yet | yes |

## How the scores have moved

### ReqRes MCP server

No score change since it was listed.

### Snowflake-managed MCP server

- -3.7 on 4 November 2026 (C to D): correction, time

## Verdicts

**ReqRes MCP server.** ReqRes' MCP server is the quickest way for a coding agent to stand up a real hosted backend, with no account, seven annotated tools and paginated records. Every result carries a sponsored line by default, the free tier is small, and unclaimed projects vanish after 72 hours.

**Snowflake-managed MCP server.** Tools are governed by Snowflake roles, the SQL tool is read-only by default, and sign-in runs through Snowflake OAuth or a company identity provider. No rate limits or tool-call error codes were found in the reviewed documentation, and a person must create the account, the server object and the OAuth integration before an agent can connect.

## Before you call either

### ReqRes MCP server

1. Add ?sponsor=0 to the server URL to keep ads out of context
2. Give the user the claim link so the project survives 72 hours
3. Use the public key in frontend code and keep the manage key server-side

### Snowflake-managed MCP server

1. Send `Accept: application/json, text/event-stream` and read `tools/call` results as an SSE stream that ends with `data: [DONE]`
2. Write the account hostname with hyphens, not underscores, or some clients fail to connect
3. Check the user's `DEFAULT_ROLE` and `DEFAULT_WAREHOUSE` first. Clients that request `session:role:all` get the default role, and a missing warehouse stops the session starting
4. Keep SQL results narrow. Responses over 250 KB are truncated with no paging, and agent tool responses can pass 200 KB
5. Treat `invalid_client` from `/oauth/token-request` as a possible network policy block as well as a wrong credential

## Questions

### Which is better for AI agents, ReqRes MCP server or Snowflake-managed MCP server?

Snowflake-managed MCP server scores 52.7 (D) on agent readiness against ReqRes MCP server's 48.8 (D), and leads in 3 of 7 scored categories. ReqRes MCP server leads on agent ergonomics, payments & pricing and maintenance & community.

### Do ReqRes MCP server and Snowflake-managed MCP server need an API key?

ReqRes MCP server needs no key. Snowflake-managed MCP server takes an API key or an OAuth sign-in.

### Can an agent call ReqRes MCP server and Snowflake-managed MCP server without installing anything?

ReqRes MCP server has a hosted endpoint at https://reqres.in/mcp. No hosted endpoint is listed for Snowflake-managed MCP server.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/reqres-mcp-vs-snowflake-managed.json, and with the fewest tokens: https://www.anchorterminal.com/compare/reqres-mcp-vs-snowflake-managed.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "reqres-mcp", "b": "snowflake-managed"}`. From a terminal: `anchor compare reqres-mcp snowflake-managed`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/reqres-mcp.json and https://www.anchorterminal.com/api/v1/tools/snowflake-managed.json

## Other comparisons with ReqRes MCP server or Snowflake-managed MCP server

- [ClickHouse MCP Server vs Snowflake-managed MCP server](https://www.anchorterminal.com/compare/clickhouse-mcp-server-vs-snowflake-managed.md)
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- [Neon MCP Server vs ReqRes MCP server](https://www.anchorterminal.com/compare/neon-mcp-vs-reqres-mcp.md)
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- [Redis MCP vs Snowflake-managed MCP server](https://www.anchorterminal.com/compare/redis-mcp-vs-snowflake-managed.md)
- [ReqRes MCP server vs Supabase API + MCP](https://www.anchorterminal.com/compare/reqres-mcp-vs-supabase-mcp.md)
- [MCP Toolbox for Databases vs ReqRes MCP server](https://www.anchorterminal.com/compare/mcp-toolbox-databases-vs-reqres-mcp.md)
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- [Redis MCP vs ReqRes MCP server](https://www.anchorterminal.com/compare/redis-mcp-vs-reqres-mcp.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp