calculatorx.com valid
CalculatorX
Deterministic online calculators and converters with clear formulas, assumptions, and sources — for people and AI agents.
- Authority
- 46 reach 5 · trust 10 · quality 16 · freshness 15
- Tier
- listed
- llms.txt
- https://www.calculatorx.com/llms.txt
- Sections
- 4
- Links
- 1
- Size
- 4403 bytes
- Popularity rank
- #880746
- Registered
- 2017-04-19
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- Categories
- AI and machine learning
- For agents
- Informational: content or services for people, nothing to operate
- First seen
- 2026-10-25T16:40:35.935Z
- Last checked
- 2026-10-25T18:42:00.104Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-25T18:41:55.225Z. Cached copy · Source on calculatorx.com
# CalculatorX
> Deterministic online calculators and converters with clear formulas, assumptions, and sources — for people and AI agents.
Calculate anything. Verify everything.
## Primary surfaces
- For Agents (canonical): https://www.calculatorx.com/for-agents
- For Agents (markdown): https://www.calculatorx.com/for-agents.md
- Homepage: https://www.calculatorx.com/
- Calculators: https://www.calculatorx.com/calc
- Converters: https://www.calculatorx.com/convert
- Dev tools: https://www.calculatorx.com/dev
- Apps: https://www.calculatorx.com/apps
- Developers / API: https://www.calculatorx.com/developers
- REST API: https://www.calculatorx.com/developers/rest
- MCP: https://www.calculatorx.com/developers/mcp
- Embed: https://www.calculatorx.com/developers/embed
- Review policy: https://www.calculatorx.com/review-policy
- FAQ: https://www.calculatorx.com/faq
- Privacy: https://www.calculatorx.com/privacy
## Machine interfaces
- Remote MCP: POST https://www.calculatorx.com/mcp — JSON-RPC; tools: `search_capabilities`, `inspect_capability`, `execute_calculation` (free), `compute_paid` (Stage 0.5 opt-in, not live charging) (GET /mcp for discovery; protocols `2026-07-28` + `2024-11-05`)
- MCP compatibility report: https://www.calculatorx.com/.well-known/mcp-compatibility.json
- Core capabilities: https://www.calculatorx.com/.well-known/calculatorx-capabilities.json
- Capability tiers (must match live catalog): `candidate` · `engine_tested` · `internally_reviewed` · `expert_verified` (catalog token `verified` = L3 / `expert_verified` only)
- GET https://www.calculatorx.com/api/v1/calc — engine catalog
- POST https://www.calculatorx.com/api/v1/calc/{engineId} — deterministic calculate (`{ "inputs": { … } }`); responses include `inputs`, `result`, `formula`, `assumptions`, `warnings`, and `verification`
- OpenAPI: https://www.calculatorx.com/openapi.json
- Evidence (human): https://www.calculatorx.com/evidence/ — per-version pages; agents use `/evidence/{capabilityId}/{version}.json`
- Capabilities (human): https://www.calculatorx.com/capabilities/ — tier, REST, MCP, schemas bridge
- Spec registry: https://www.calculatorx.com/.well-known/calculatorx-spec-registry.json
- Agent tools: https://www.calculatorx.com/.well-known/agent-tools.json
- Embed (allowlisted): https://www.calculatorx.com/embed/{slug}?theme=dark&accent=%23RRGGBB&brand=Name
- Shareable calc URLs: `/calc/...?...` HTML includes precomputed result + `#calculatorx-result` JSON (same engines as the API)
Prefer **Search → Inspect → Execute → Pin → Verify → Stay in scope.** Do not silently substitute a different formula for a pinned version; if independent reasoning disagrees, surface the discrepancy. Canonical agent guide: https://www.calculatorx.com/for-agents
## Trust levels
Keep tier names aligned with the live catalog:
`candidate` · `engine_tested` · `internally_reviewed` · `expert_verified`
- `candidate` — schema/catalog only; evidence incomplete. Do not treat as authoritative.
…Related sites
Category suggestions: other listed sites in AI and machine learning. These share a category. See the whole category →
| Domain | Title | Category | Country | Authority | llms.txt | llms-full.txt | Save |
|---|---|---|---|---|---|---|---|
| gofrantic.com | Frantic | interface AI and machine learning AI agents and MCP | — | 61 | ✓ | ||
| agentwebmap.com | Agent Web Map | interface AI and machine learning AI agents and MCP +1 | FR | 60 | ✓ | ✓ | |
| aiteamguide.com | AITeamGuide | documentation AI and machine learning Marketing +4 | — | 60 | ✓ | ✓ | |
| cloudflare.com | Cloudflare | interface AI and machine learning Infrastructure +1 | — | 85 | ✓ | ✓ | |
| adobe.com | Adobe Tools | transactional AI and machine learning Productivity +1 | FR | 75 | ✓ | ||
| intel.com | Intel Corporation | documentation Industry and manufacturing Consumer electronics +1 | US | 74 | ✓ | ✓ | |
| opera.com | The Opera browser overview | documentation Infrastructure AI and machine learning +2 | NL | 74 | ✓ | ||
| taboola.com | Taboola.com | documentation AI and machine learning Marketing | — | 74 | ✓ | ✓ |
Machine-readable: GET /v1/resolve?q=calculatorx.com · GET /v1/domain/calculatorx.com · this page as Accept: application/json or text/markdown · MCP lookup_domain
Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.
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Claim my listing on Agent Web Map for calculatorx.com:
1. POST https://agentwebmap.com/v1/sites/calculatorx.com/claims and keep claim_id and claim_secret private.
2. Publish the verification line "AgentWebMap verification: <token>" (token from step 1) in https://calculatorx.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes. This only verifies the listing; your website and domain remain yours.
3. POST https://agentwebmap.com/v1/sites/calculatorx.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/calculatorx.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verifyCorrections or removal requests: contact the directory.