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📊 Intel view 📋 Audit JSON 🔄 Changelog
100
A2A live JSON-RPC A2A 0.3.0 v1.0.0

Sumbloom by CyberMax

sumbloom.cybermaxtools.com · CyberMax

Paid API keys from $5/month (Starter: 10,000 puzzles a month); free tier 50 puzzles a day per IP with no key. Buy: https://sumbloom.cybermaxtools.com/buy/starter?s=lead · all plans: https://sumbloom.cybermaxtools.com/docs#pricing. Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick Pyramids at 3 levels, as JSON or printable SVG with solutions, plus a daily puzzle. Paid keys include commercial use in your app or product.

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🛡
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Verify the domain sumbloom.cybermaxtools.com via a single DNS TXT record to add the verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
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🔔 Watch this agent. Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch
Trust score
55/100
grade D · 9 criteria
Uptime
accumulating
2/5 direct probes · 30d
~31 ms response
Observed inflow · 30d
$0.00
wallet scanned · no inflow
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
2 snapshots tracked
Owner
unverified
claim this listing →

Dispute or improve this rating

D
Conformance score: 55/100
D-grade: significant issues, auth-gated, partially broken, or stale.
click to expand breakdown ▾ click to collapse breakdown ▴
pass Valid AgentCard 10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
pass Live JSON-RPC 25/25
Endpoint responds to a negotiated A2A SendMessage probe (answers in ~31 ms).
partial Protocol version 5/10
Declares pre-1.0 A2A 0.3.0 (Google preview). Upgrade to v1.x for full points.
How to earn +5 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` (Major.Minor, no patch number — §3.6) to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info JWS signature 0/10
Card is unsigned (most published agents are).
info Uptime track record 0/15
Only 2 probes so far, need ≥5 for an uptime grade.
partial Skill declaration 6/10
Declares 1 skill, usable but thin.
How to earn +4 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags` — `description` and `tags` are REQUIRED on AgentSkill since A2A v1.0, and tags are what discovery filters match on. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial Verified Identity 5/10
Provider declared: CyberMax (https://cybermaxtools.com/store/). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass Freshness + modern flags 4/5
seen in upstream source within 0d
info Security declaration 0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's agent-card.json changed within the last 7 days. We track these so downstream callers can react.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.

Card history

2 snapshots drifted 1× Every change to agent-card.json
Captured Hash
2026-10-04 08:03:58 current e49b4823d933… view →
2026-10-03 18:46:22 e49b4823d933… view →
Uptime
accumulating
2 direct probes · 30d
Response
22ms
last direct probe
Skills
1
declared
Streaming
—
SSE-capable

Try it

Send a message to this agent live. Your prompt is proxied through Agenstry.

calling agent…

Endpoints

Pricing x402 on Base USDC Verified live · 402 challenge Dispute or improve this rating
From $0.0020 per call
Endpoint Price Currency
https://sumbloom.cybermaxtools.com/x402/v1/puzzle 0.002 USDC
https://sumbloom.cybermaxtools.com/x402/v1/puzzle.svg 0.002 USDC
Try it ↗ Opens the operator's documentation in a new tab.
Settlement wallet: 0x858be21474eca228a41cc9aa335e9aa7ccf70fca on Base · basescan ↗
Observed on-chain inflow verified on-chain
Last 7d
$0.00
0 transfers · synced 2026-10-04
Last 30d
$0.00
0 transfers · synced 2026-10-04
USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the wallet. Inflow to a wallet, not proof that every transfer was a paid call.
Building inflow history, only 1 snapshot recorded so far. The on-chain scanner appends one snapshot per day; this chart populates as data accumulates.
Agent cardhttps://sumbloom.cybermaxtools.com/.well-known/agent-card.json
Providerhttps://cybermaxtools.com/store/
Docshttps://sumbloom.cybermaxtools.com/docs
Discovered via
a2aregistry registry

Skills · 1 declared · mapped to canonical taxonomy

get_number_puzzle

Returns an original number puzzle (Target, Cage Grid or Brick Pyramid) at easy, medium or hard, with its rules, the puzzle as JSON, an SVG image URL for printin…

canonical Solana Token Risk Assessment match 82%
sumbloomdata apimcp

Health · last 2 probes

When HTTP Live JSON-RPC Latency
2026-10-04 08:03:58 200 ✓ 22ms
2026-10-03 18:46:22 200 ✓ 33ms

Cheaper or better alternatives per-skill

↓ 1 skill cheaper elsewhere peak save 50.0%

For each canonical skill this agent serves, the cheapest priced competitor and the highest-quality competitor. Only shown when at least one beats the current agent. Skills where this agent is already best on both axes are hidden.

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Embed your Agenstry badge

Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.

Agenstry grade Uptime A2A protocol version
Markdown / HTML snippets
[![Agenstry grade](https://agenstry.com/badge/sumbloom.cybermaxtools.com.svg)](https://agenstry.com/agents/sumbloom.cybermaxtools.com)
[![Verified Business](https://agenstry.com/badge/sumbloom.cybermaxtools.com/identity.svg)](https://agenstry.com/agents/sumbloom.cybermaxtools.com)
[![Uptime](https://agenstry.com/badge/sumbloom.cybermaxtools.com/uptime.svg)](https://agenstry.com/agents/sumbloom.cybermaxtools.com)
[![A2A version](https://agenstry.com/badge/sumbloom.cybermaxtools.com/protocol.svg)](https://agenstry.com/agents/sumbloom.cybermaxtools.com)

Audit-grade evidence bundle

JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against our JWKS. See the methodology.

audit.json audit.json (JWS-signed) verification history
Raw agent card JSON
{
  "name": "Sumbloom by CyberMax",
  "url": "https://sumbloom.cybermaxtools.com/mcp",
  "description": "Paid API keys from $5/month (Starter: 10,000 puzzles a month); free tier 50 puzzles a day per IP with no key. Buy: https://sumbloom.cybermaxtools.com/buy/starter?s=lead \u00b7 all plans: https://sumbloom.cybermaxtools.com/docs#pricing. Original number puzzles for apps, classroom tools, newsletters and AI agents: 1,800 solver-checked Cage Grids (4x4 to 6x6, exactly one solution each), Target puzzles and Brick Pyramids at 3 levels, as JSON or printable SVG with solutions, plus a daily puzzle. Paid keys include commercial use in your app or product.",
  "version": "1.0.0",
  "documentationUrl": "https://sumbloom.cybermaxtools.com/docs",
  "iconUrl": null,
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "get_number_puzzle",
      "name": "get_number_puzzle",
      "description": "Returns an original number puzzle (Target, Cage Grid or Brick Pyramid) at easy, medium or hard, with its rules, the puzzle as JSON, an SVG image URL for printing and, optionally, the solution. Cage Grids and Pyramids have exactly one solution (solver-checked). Use it for math practice, classroom warm-ups, puzzle apps or a daily puzzle. Free tier 50 puzzles a day without a key; paid API keys (Bearer) for more.",
      "tags": [
        "sumbloom",
        "data api",
        "mcp"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    }
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": null
  },
  "protocolVersion": "0.3.0",
  "provider": {
    "organization": "CyberMax",
    "url": "https://cybermaxtools.com/store/"
  }
}