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RationalBloks

REMOTE · MCP.RATIONALBLOKS.COM · 2 COMPONENTS

Deploy production REST and Neo4j Graph APIs from JSON schemas in seconds.

0 this week 75 Trust /100

Last scanned (9 hours ago)

Scores higher than 64% of remote servers

Reachable. Last reached 5 Nov 2026.

Category Cloud Infrastructure

Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security46
Transport & Reachability100
Schema Quality & AI Usability80
  • 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 11724 tokens (~174/item across 67 items; 64 tools + 3 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
  • No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • All 12 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
  • An AI judge read all 66 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a current MCP spec version (2026-07-28).Pass
Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 14 Oct 26 0
    • Stability: 0.97 → pass security
    • The server rewrote its instructions, which are the text every model session reads security
    • Tool “get_schema_reference” rewrote its description, which is the text the model reads security
    • Tool “create_project” rewrote its description, which is the text the model reads security
    • Tool “update_schema” rewrote its description, which is the text the model reads security
    • Server version: 0.16.0 → 0.16.1 functional
  • 13 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

  • 12 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 93. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

  • 10 Oct 26 +3
    • Schema quality: 9955 → 11666 ▼ functional
  • 3 Oct 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

  • 28 Sept 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 25 Sept 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 24 Sept 26 0
    • Tool “get_schema” rewrote its description, which is the text the model reads security
    • Tool “update_schema” rewrote its description, which is the text the model reads security
    • Server version: 0.14.1 → 0.15.0 functional
    • New tool “patch_schema” functional
    • “get_schema” added an optional parameter “fields” cosmetic
    • “get_schema” added an optional parameter “tables” cosmetic
    • “update_schema” added an optional parameter “expected_version” cosmetic
    • “update_schema” reworded the description of “dry_run” cosmetic
Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 5 Nov 2026 · Probed https://mcp.rationalbloks.com/

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=mcp.rationalbloks.com CN=YR1,O=Let's Encrypt,C=US 11 Sept 2026 10 Dec 2026 RSA 2048 SHA256-RSA 657d158882d7dba339553324a8887d6b901
SANs: mcp.rationalbloks.com
CN=YR1,O=Let's Encrypt,C=US (CA) CN=Root YR,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 RSA 2048 SHA256-RSA a20253f15f2691c05dc1ce13b9bcca4e
CN=Root YR,O=ISRG,C=US (CA) CN=ISRG Root X1,O=Internet Security Research Group,C=US 13 May 2026 2 Sept 2032 RSA 4096 SHA256-RSA f24b6d17f9d9ad7cb1c9fea78782699f

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of mcp.rationalbloks.com. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
com. present 19718 13 Verified
rationalbloks.com. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://mcp.rationalbloks.com/ Verified 200
http (plaintext) http://mcp.rationalbloks.com/ Inconclusive 404
MCP tools · 64 exposed · ~11,267 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
redeploy_project ~219

Rebuild and roll out a project's staging environment from the schema it runs, with NO schema change, for a relational or a graph project: the current platform release, the project's settings (email, admin users) and its environment take effect. Refused (409) when the saved schema holds changes the last deploy did not apply (deploy_staging deploys those) or when nothing was deployed yet; a save that lands meanwhile is refused rather than deployed. deploy_production rebuilds production the same way when staging runs what production runs. The operation is ASYNCHRONOUS: poll the returned job_id with get_job_status. One operation runs on a project at a time: while another runs, the call is refused and the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
project_idstringyesProject ID (UUID), relational or graph

No output schema declared.

No examples provided.

rename_project ~45

Rename a project (changes display name, not project_code)

NameTypeReqDescription
namestringyesNew display name for the project
project_idstringyesProject ID (UUID)

No output schema declared.

No examples provided.

rollback_graph_project ~186

Rollback a graph project to a previous version. ⚠️ WARNING: This reverts schema AND code to the specified commit. Neo4j data is NOT rolled back. Use get_graph_version_history to find the commit SHA of the version you want to rollback to. After rollback, the graph API will be redeployed with the old schema. One operation runs on a project at a time: while another runs, the call is refused and the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
environmentstring–Environment: staging or production (default: staging)
project_idstringyesProject ID (UUID)
versionstringyesCommit SHA to rollback to

No output schema declared.

No examples provided.

rollback_project ~192

Rollback a project to a previous version. ⚠️ WARNING: This reverts schema AND code to the specified commit. Database data is NOT rolled back. Use get_version_history to find the commit SHA of the version you want to rollback to. After rollback, use get_job_status to monitor the redeployment. Rollback is useful when a schema change breaks deployment. One operation runs on a project at a time: while another runs, the call is refused and the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
environmentstring–Environment: staging or production (default: staging)
project_idstringyesProject ID (UUID)
versionstringyesCommit SHA or version to rollback to

No output schema declared.

No examples provided.

scale_module ~118

Run 1 or 2 pods of a module (freeze_module stops it). One operation runs on a module at a time, and none beside an operation on its project: the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
module_idstringyesModule ID (list_modules)
replicasintegeryes1 or 2 pods

No output schema declared.

No examples provided.

search_graph_nodes ~193

Search for nodes by property values in a deployed graph project. Supports exact match and contains search (prefix value with ~ for contains). Examples: Exact: filters: {"name": "Alan Turing"} Contains: filters: {"name": "~turing"} (case-insensitive) Combined: entity_type: "person", filters: {"field": "~physics"} Without entity_type, searches ALL node types.

NameTypeReqDescription
entity_typestring–Entity key to filter by (optional — omit to search all types)
environmentstring–Environment: staging or production (default: staging)
filtersobjectyesProperty filters. Prefix value with ~ for contains search.
limitinteger–Max results (default: 100, max: 1000)
offsetinteger–Pagination offset (default: 0)
project_idstringyesProject ID (UUID)

No output schema declared.

No examples provided.

set_module_env ~238

Set a module's environment variables: {NAME: value} sets one, {NAME: null} removes one, and every variable not named is kept. A backend module restarts to take them; a frontend module rebuilds (they are build arguments). Values are stored encrypted and never returned: the answer and list_modules name the variables only. DESTRUCTIVE: a value replaced or removed cannot be read back. CORS_ORIGINS, DEPLOY_* and GITHUB_TOKEN are the platform's. The operation is a job: poll the returned job_id with get_job_status. One operation runs on a module at a time, and none beside an operation on its project: the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
env_varsobjectyes{NAME: value} to set (text), {NAME: null} to remove; variables not named are kept
module_idstringyesModule ID (list_modules)

No output schema declared.

No examples provided.

set_module_resources ~172

Set a module's CPU and memory and rebuild it so its pods take them. The allocation is checked against the resource pool's capacity first; a refused one is restored. The operation is ASYNCHRONOUS: poll the returned job_id with get_job_status. One operation runs on a module at a time, and none beside an operation on its project: the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
cpu_millicoresintegeryesCPU allocation in millicores
memory_mbintegeryesMemory allocation in MB
module_idstringyesModule ID (list_modules)

No output schema declared.

No examples provided.

traverse_graph ~256

Walk the graph from a starting node, discovering connected knowledge. Returns all nodes reachable within max_depth hops, with their distance from the start. Essential for exploring knowledge graphs — find related concepts, trace connections, discover clusters. Example: Start from "Alan Turing", traverse outgoing relationships up to 3 hops deep: start_entity_type: "person" start_entity_id: "alan-turing-001" max_depth: 3 direction: "outgoing" Supports filtering by relationship types and direction.

NameTypeReqDescription
directionstring–Direction: outgoing, incoming, or both (default: both)
environmentstring–Environment: staging or production (default: staging)
limitinteger–Max results (default: 100, max: 1000)
max_depthinteger–Maximum traversal depth (default: 3, max: 10)
project_idstringyesProject ID (UUID)
relationship_typesarray–Filter by relationship types (UPPER_SNAKE_CASE). Omit for all types.
start_entity_idstringyesEntity ID of the starting node
start_entity_typestringyesEntity key of the starting node

No output schema declared.

No examples provided.

unfreeze_module ~116

Start a frozen module's pods again, as many as it ran before the freeze. A running module is left as it is. One operation runs on a module at a time, and none beside an operation on its project: the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
module_idstringyesModule ID (list_modules)

No output schema declared.

No examples provided.

update_graph_node ~108

Update properties of an existing node in a deployed graph project. Only send the fields you want to change — unspecified fields remain unchanged.

NameTypeReqDescription
dataobjectyesProperties to update (partial update)
entity_idstringyesThe node's entity_id
entity_typestringyesEntity key (e.g., 'person', 'concept')
environmentstring–Environment: staging or production (default: staging)
project_idstringyesProject ID (UUID)

No output schema declared.

No examples provided.

update_graph_schema ~297

Replace a graph project's WHOLE schema (saves to database, does NOT deploy). DESTRUCTIVE: an entity, relationship or field the schema leaves out is deleted by the next deploy. ⚠️ Follow ALL rules from create_graph_project: • Must have "nodes" key with at least one entity • Each entity needs "description" and "schema" with field definitions • Each field is {"type": "...", "required": true/false} — required defaults to false • Relationships need "from", "to", and "cardinality" • Field types: string, integer, float, boolean, date, json • Relationship types should be UPPER_SNAKE_CASE • Entity names should be PascalCase WORKFLOW: 1. get_graph_schema to see the current schema (its 'version' pins the save) 2. preview_schema_change with the new schema: check 'diff' and 'plan' 3. update_graph_schema (pass expected_version to be refused if someone else saved meanwhile) 4. deploy_graph_staging, then get_job_status

NameTypeReqDescription
expected_versionstring–The 'version' a get_graph_schema read answered. The save is refused (409) when the saved schema changed since.
project_idstringyesProject ID (UUID)
schemaobjectyesNew graph schema with 'nodes' and optionally 'relationships' keys — the WHOLE schema.

No output schema declared.

No examples provided.

update_module ~150

Rename a module, or point it at another GitHub repository, which its next redeploy builds. Pass module_name, github_repo_url or both. One operation runs on a module at a time, and none beside an operation on its project: the refusal names the running job; wait for it with get_job_status, then call again. While RationalBloks is being updated, the call is refused with 'RationalBloks is being updated': call it again in a few minutes.

NameTypeReqDescription
github_repo_urlstring–New repository, https://github.com/<owner>/<repo>
module_idstringyesModule ID (list_modules)
module_namestring–New display name

No output schema declared.

No examples provided.

update_schema ~391

Replace a project's WHOLE schema (saves to database, does NOT deploy). DESTRUCTIVE: a table or field the schema leaves out is dropped by the next deploy. For a new data model or a template. To change part of a schema use patch_schema, and drop_schema_items to drop; sending back a large schema to change one field risks changing something else on the way. ⚠️ Follow ALL rules from create_project: • FLAT format (no 'fields' nesting) • string: max_length (default 255) • decimal: precision + scale (default 10, 2) • Use "datetime" NOT "timestamp" • DON'T define: id, created_at, updated_at, row_version • NEVER create users/customers/employees tables (use app_users) ⚠️ MIGRATION RULES: • New fields MUST be "required": false OR have "default" value • Cannot add required field without default to existing tables WORKFLOW: 1. get_schema to see the current schema (its 'version' pins the save) 2. preview_schema_change with the new schema: check 'diff' and 'plan' 3. update_schema (pass expected_version to be refused if someone else saved meanwhile) 4. deploy_staging, then get_job_status A schema the deploy would refuse is refused here, and nothing is saved. The answer carries 'diff', 'plan' and the new 'version'.

NameTypeReqDescription
expected_versionstring–The 'version' a get_schema read answered. The save is refused (409) when the saved schema changed since, so two editors never overwrite each other silently.
project_idstringyesProject ID (UUID)
schemaobjectyesNew JSON schema in FLAT format (table_name → field_name → properties) — the WHOLE schema. Every field MUST have a 'type' property.

No output schema declared.

No examples provided.

Install

How do I install the RationalBloks MCP server?

RationalBloks is a hosted endpoint at https://mcp.rationalbloks.com/, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · mcp.rationalbloks.com

# add to Claude Code
claude mcp add --transport http com-rationalbloks-mcp 'https://mcp.rationalbloks.com/'
Common questions

What is the RationalBloks MCP server?

RationalBloks is an MCP server listed in the public MCP registry as com.rationalbloks/mcp. Deploy production REST and Neo4j Graph APIs from JSON schemas in seconds. This page covers its hosted endpoint (https://mcp.rationalbloks.com/).

Is the RationalBloks MCP server safe to use?

RationalBloks scores 75 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the RationalBloks MCP server expose?

RationalBloks exposes 64 tools: list_projects, get_project, get_schema, get_user_info, list_clusters, and 59 more. Their descriptions and schemas cost roughly 11,267 tokens of context every time the server is loaded.

Does the RationalBloks MCP server require authentication?

No. We connected to RationalBloks without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the RationalBloks MCP server still maintained?

RationalBloks is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.