Head to head · Document databases · October 2026 research run

MCP Toolbox for Databases vs ReqRes MCP server

MCP Toolbox for Databases scores 77.7 (BB) on agent readiness against ReqRes MCP server's 48.8 (D), and leads in every scored category. Both do document databases.

Best database, file and memory tools for AI agents · All 111 databases comparisons

Which one, for what

MCP Toolbox for Databases BB

Best for Agents and coding assistants that need one server across Google Cloud data services and common databases, or production agents with curated SQL tools.

Ahead on

  • Reliability, 80 against 30
  • Schema & documentation, 85 against 61
  • Agent ergonomics, 82 against 76
  • Security & auth, 75 against 33
  • Payments & pricing, 60 against 50
  • Maintenance & community, 95 against 50
  • Transparency & trust, 64 against 47

Also in its favour

  • Agent-ready, a grade of BB or better
  • Runs on your own machine
  • Open source

Watch for

--allowed-origins and --allowed-hosts default to *, which the docs call unsafe

ReqRes MCP server D

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

Also in its favour

  • No key needed to call it
  • A hosted endpoint, with nothing to install

Watch for

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

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Reliability MCP Toolbox for Databases +50

MCP Toolbox for Databases 80

Scored as local software the owner runs. A Go binary, a container in Artifact Registry and @toolbox-sdk/server on npm, with install paths per platform (20). Tests, lint, conformance and nightly tier-report workflows in the repository; the pass state wasn't read (15). 432 open issues and pull requests on a repository with 16,818 stars and releases every two weeks, triaged with labels, though the backlog is large (15). Semantic versioning with a published policy, release-please CHANGELOG and an UPGRADING.md (15). 1.x since well before this check, v1.16.0 now (15). 20 + 15 + 15 + 15 + 15 = 80.

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.

Maintenance & community MCP Toolbox for Databases +45

MCP Toolbox for Databases 95

v1.16.0 on 5 November 2026, one day before this check (30). Eight releases from v1.10.0 (27 August) to v1.16.0 in the 90 days (20). Pull requests merge daily and new tools land in each fortnightly release, though 432 issues and pull requests are open (20). io.github.googleapis/mcp-toolbox is in the official registry at 1.16.0 (15). Release automation, lint, tests and conformance workflows (10). 30 + 20 + 20 + 15 + 10 = 95.

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.

Security & auth MCP Toolbox for Databases +42

MCP Toolbox for Databases 75

Source credentials stay in Toolbox, Google sources use IAM, and optional MCP authorisation validates OAuth 2.1 JWTs with required scopes. --allowed-origins and --allowed-hosts default to *, which the CLI docs themselves call unsafe even on localhost, though the default bind is 127.0.0.1 (20). Read-only mode is enforced at the engine, write tools are suppressed, and custom tools can fix SQL and bind parameters to the signed-in user (18). The security docs cover prompt injection and screening through Model Armor (12). OpenTelemetry traces and metrics per call when exported (10). Google's vulnerability intake with a stated response time and GitHub advisories (15). 20 + 18 + 12 + 10 + 15 = 75.

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.

Schema & documentation MCP Toolbox for Databases +24

MCP Toolbox for Databases 85

Every tool's parameters are typed in tools.yaml and published as JSON Schema over MCP (25). mcp-toolbox.dev serves llms.txt (10). Prebuilt descriptions vary from one line ("Use this tool to execute a single SQL statement.") to detailed, and few say when not to use a tool (12). Typed parameters with required flags; execute_sql takes free SQL (12). Many examples, samples and codelabs; error responses are thinly documented (11). Semver, a dated CHANGELOG and versioned docs (15). 25 + 10 + 12 + 12 + 11 + 15 = 85.

ReqRes MCP server 61

Seven tools read from tools/list with JSON Schema inputs (25). llms.txt (10). A tool table says what each does (12 of 20). Records and fields are free-form objects (5 of 15). Worked flow on the MCP page, no error docs (6 of 15). Registry 1.0.0, no changelog (3 of 15). 25 + 10 + 12 + 5 + 6 + 3 = 61.

Transparency & trust MCP Toolbox for Databases +17

MCP Toolbox for Databases 64

Apache-2.0 (30). A self-hosted server; data goes only to the configured sources and to a telemetry exporter if one is set. There is no data-handling statement of its own (15). A versioning policy defining breaking changes, UPGRADING.md and a notice for the repository rename; prebuilt tool removals are listed in the changelog (16). Telemetry is off unless --telemetry-otlp or --telemetry-gcp is set, and the docs say so (16). 30 + 15 + 16 + 16 = 77.

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.

Payments & pricing MCP Toolbox for Databases +10

MCP Toolbox for Databases 60

Free, self-hosted, nothing to buy, so 20 + 20 + 20. No payment protocol (0).

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.

Score by category

CategoryWeight this runMCP Toolbox for DatabasesReqRes MCP serverEdge
Reliability16%208030MCP Toolbox for Databases +50
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28561MCP Toolbox for Databases +24
Agent ergonomics13%16.28276MCP Toolbox for Databases +6
Security & auth14%17.57533MCP Toolbox for Databases +42
Payments & pricing10%12.56050MCP Toolbox for Databases +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.89550MCP Toolbox for Databases +45
Transparency & trust7%8.86447MCP Toolbox for Databases +17
Negative events≤1500
TotalBB 77.7/100D 48.8/100

Facts side by side

FactMCP Toolbox for DatabasesReqRes MCP server
KindMCP serverMCP server
VendorGoogleReqRes
Hosted endpointno (local only)https://reqres.in/mcp
Transportsstdio, Streamable HTTPStreamable HTTP
AuthOAuth or keyNone
PricingFreeFreemium
x402nono
LicenceApache-2.0none
Tools exposed297
Read-only variant documentedyesno
llms.txtyesyes
MCP registryio.github.googleapis/mcp-toolboxin.reqres/reqres
Last release2026-11-05none
Terms last updatedno document linkednot read yet
Privacy policy last updatedno document linkednot read yet
Popularity17k starsnone

Verdicts

MCP Toolbox for Databases

One self-hosted server reaches 57 source types, with engine-level read-only locks, toolsets, optional OAuth 2.1 and fortnightly semver releases under Apache-2.0. Prebuilt sets list 9 to 41 tools, origin and host checks default to any, and 432 issues and pull requests are open.

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.

Before you call either

MCP Toolbox for Databases

  1. Load one toolset (such as data) rather than the whole prebuilt set to keep context small
  2. Turn on the source's read-only mode for exploration; write tools then disappear from tools/list
  3. Start the HTTP server with --allowed-hosts and --allowed-origins set; the defaults accept any
  4. Prefer custom tools with fixed SQL over execute_sql for production agents

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

Questions

Which is better for AI agents, MCP Toolbox for Databases or ReqRes MCP server?

MCP Toolbox for Databases scores 77.7 (BB) on agent readiness against ReqRes MCP server's 48.8 (D), and leads in every scored category.

Do MCP Toolbox for Databases and ReqRes MCP server need an API key?

MCP Toolbox for Databases takes an API key or an OAuth sign-in. ReqRes MCP server needs no key.

Can an agent call MCP Toolbox for Databases and ReqRes MCP server without installing anything?

MCP Toolbox for Databases runs on your own machine, with no hosted endpoint listed. ReqRes MCP server has a hosted endpoint at https://reqres.in/mcp.

Are MCP Toolbox for Databases and ReqRes MCP server open source?

MCP Toolbox for Databases is open source (Apache-2.0). No open-source release is listed for ReqRes MCP server.

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