Question 1

Are there hidden credit costs or premium-endpoint surcharges?

Accepted Answer

Plans use request quotas with no credit weighting or premium endpoint surcharges. A natal chart, a tarot draw and a Remote MCP calculation each consume one quota unit. Estimate your allowance from the calculation calls your application makes.

Question 2

Is a Data Processing Addendum included?

Accepted Answer

The published Data Processing Addendum is included on every plan. It describes processor obligations, security measures, subprocessors and applicable transfer safeguards. Service data is stored at rest in Germany; review /policy/dpa and its annexes for the processing scope and response-cache details.

Question 3

Can I use the same API key to access all APIs?

Accepted Answer

One subscription covers all 18+ domains and every endpoint. Use a secret key for REST and Remote MCP, or a publishable key for permitted browser integrations. There are no separate product subscriptions or per-domain fees.

Question 4

What comes with a plan besides API requests?

Accepted Answer

Every plan includes Remote MCP access and the complete API catalog. SDKs for TypeScript, Python, PHP, C#, and Go, MIT-licensed UI components and templates, embeddable widgets and a WordPress plugin provide ways to build on it. Responses support 10+ languages, with localization coverage documented by domain and field.

Question 5

Is Remote MCP included, or does it cost extra?

Accepted Answer

Remote MCP is included on every plan. Each domain provides a Streamable HTTP server for compatible clients that support the required authentication. Calculation tool calls consume the same request allowance as REST; connection guidance is at /docs/mcp.

Question 6

Do you charge per token for AI, or can I bring my own model?

Accepted Answer

Use your own model and pay its provider separately for inference. RoxyAPI charges for calculation requests, with Remote MCP and SDKs supplying the data and tools your application calls. API request bodies are never persisted. Responses derived from submitted data may be cached for up to 24 hours; Cache-Control: no-store bypasses the cache. Usage metadata retention is in /policy/privacy. Your application keeps user profiles and memory.

Question 7

How accurate are the calculations, and how is that verified?

Accepted Answer

For the Sun, Moon, planets and Chiron, RoxyAPI returned 231 of 231 positions within 0.32 arcseconds (0.00009 degrees) of NASA JPL Horizons, at a median deviation of 0.05 arcseconds (0.00001 degrees). The open RoxyAPI benchmark checks 17 domains, each against its own named authority, from planets, angles and sidereal charts to calendars, time zones and printed rules, and returned 2,701 of 2,701 values within their stated tolerance; only tarot, crystals, dreams and angel numbers, which have no outside value to measure, are left out. The methodology page documents the verification suite, including 3,620 gold-standard tests; review /methodology, the live report at roxyapi.github.io/astrology-api-benchmark and live output in /api-reference.

Question 8

Can I build a commercial, closed-source app and sell it?

Accepted Answer

The API license permits commercial applications without requiring disclosure of your application source. Usage is covered by the subscription allowance, with no per-user royalties or revenue share charged by RoxyAPI. Review /policy/license for permitted use and the applicable terms.

Question 9

I only need astrology. Is $39 a month worth it?

Accepted Answer

Starter includes Western natal charts, horoscopes, synastry and transits, plus advanced techniques such as progressions and astrocartography. Vedic charts, KP, dasha and matching methods are also included, alongside every other RoxyAPI domain. Compare the endpoints, verification evidence and request allowance with your requirements before subscribing.

Question 10

How should I compare API prices?

Accepted Answer

Compare the request allowance, the calls needed for your feature and the domains included in the subscription. RoxyAPI includes all 18+ domains, Remote MCP and integration tools, with one quota unit per billable calculation request. Published verification evidence and the commercial license are additional checks to make alongside the price.

Question 11

Why pay when I could build this myself?

Accepted Answer

A hosted subscription supplies maintained calculations, verification evidence and API access across 18+ domains. It also includes Remote MCP and integration paths through SDKs, supported UI renderers and templates. Compare that scope with the ongoing calculation, localization and operational work your own implementation would require.

Question 12

How does billing work?

Accepted Answer

Choose monthly or annual billing at checkout. API access is activated after payment, and the request allowance follows a UTC calendar month independently of the billing cycle. You can inspect live output in the API reference before paying.

Question 13

When does my monthly request quota reset?

Accepted Answer

The request allowance resets at the start of each UTC calendar month, independently of your subscription renewal date. Annual plans receive a new allowance each calendar month, and unused requests do not roll over. The account dashboard shows the current allowance and reset date.

Question 14

What happens if I exceed my limits?

Accepted Answer

Requests that exceed an enforced monthly or per-minute allowance receive HTTP 429. Starter permits 600 requests per minute, with the other plan limits shown at /pricing. RoxyAPI does not add automatic overage charges; you can upgrade when you need a larger allowance.

Question 15

Can I see my API usage?

Accepted Answer

The account dashboard shows your request allowance, consumption and usage by domain, including REST and MCP activity. It also provides endpoint summaries and a request log. Usage warning emails help you monitor consumption as it approaches the monthly allowance.

Question 16

Can I change plans?

Accepted Answer

You can change your plan or billing cycle from the account dashboard or checkout and keep the same API keys. The new allowance applies after payment. Unused paid value is converted into additional time on the new plan, as shown in the checkout quote.

Question 17

Do you support multiple languages?

Accepted Answer

API localization supports 10+ languages: English, Turkish, German, Spanish, Hindi, Portuguese, French, Russian, Chinese (Simplified), Chinese (Traditional). Coverage varies by domain and response field, and untranslated content can remain in English. Check the endpoint language options and its live output in /api-reference for the reading you need.

Question 18

Do you provide invoices for payments?

Accepted Answer

Invoices are issued for payments, including renewals. Directly billed purchases have downloadable invoices in the account dashboard, and billing details can be updated there. If your checkout uses a merchant of record, that seller provides the invoice under its billing terms.

Capability	RoxyAPI	Legacy astrology APIs	DIY open source libraries
Platform
Count domains as distinct systems, not as features of one. Horoscopes, natal charts, synastry and compatibility are all astrology and count once here, so an honest total can read smaller than a padded one, and a high endpoint count usually means one result split across separately billed calls.
One key, 18 domains Astrology, vedic astrology, forecast, human design, numerology, tarot, and more behind a single subscription and a single API key.	Yes	Per product	One library each
Flat request pricing 1 request equals 1 unit, REST or MCP, with no credit weighting and no premium endpoint surcharges. Credit-metered providers bill a different unit: on one such published table a single birth chart draws 50 credits, so divide their allowance by the per call weight before comparing it with a RoxyAPI request quota.	Yes	Credit tables	Self hosted
One call, complete result A natal chart or kundli returns whole in one response instead of splitting into many separately billed calls.	Yes	Split calls	Assembly required
New domains at no extra cost Every new domain lands inside the existing plan automatically.	Yes	New invoice	New build
Simple surface, advanced core
One request returns a complete result, so the advanced layer lives inside the engine instead of inside your integration. RoxyAPI is built by a small, independent team of senior engineers, each with over 20 years building consumer and lifestyle products at scale, including at some of the biggest names in the industry.
Western astrology past the natal chart Fixed stars, asteroid goddesses, Arabic lots, Black Moon Lilith, aspect pattern detection, secondary progressions, solar arc directions, annual profections, astrocartography, relocation charts, local space, and the solar, lunar and planetary return charts.	Advanced layer	Natal and transits	Raw positions
Classical Vedic with the reasoning attached A yoga verdict carries the classical evidence that triggered it and the precedence rule that silenced it, so an agent can explain a judgement instead of restating a label. Shadbala, bhava bala, ashtakavarga, Arudha padas, Chara Karakas, three avastha systems, and KP sub-lords ship alongside it.	48 verdicts, with evidence	Yoga names	Positions only
Human Design past type and authority Variables with Color, Tone and Base, the advanced Primary Health System layer, plus Penta for small groups, two-person connection charts, and transit overlays on a natal bodygraph.	Variables and Penta	Type and profile	No engine to fork
Domains that compose, not just coexist Human Design is computed FROM the western ephemeris and the I Ching hexagrams rather than bolted on as a separate product line, so every gate activation carries its hexagram, and one forecast request merges western transit events with Vimshottari dasha boundaries and biorhythm critical days into a single time ordered feed. The sidereal and tropical engines are tested to return the same sky at zero tolerance.	One shared engine	Separate products	You merge it
Licensing and privacy
The AGPL exposure most teams carry was never a decision: a package manager hands you the free path, so a team installs a Swiss Ephemeris wrapper, ships a network service, and inherits copyleft without reading it. That licence is a private contract with no public registry, so ask any provider for their position in writing.
Own engine, not a Swiss Ephemeris wrapper Roxy Ephemeris is built in house and reads the NASA JPL DE440 ephemeris directly, verified against NASA JPL Horizons. Legacy engines wrap Swiss Ephemeris, a desktop-era calculation library under the AGPL copyleft unless commercially licensed, and a buyer cannot verify from outside which version or licence a provider runs, so ask for the position in writing.	Roxy Ephemeris	Swiss based, licence unverifiable	Swiss based, AGPL unless licensed
No AGPL exposure The AGPL on Swiss Ephemeris reaches network services, so products built on unlicensed wrappers inherit the obligation whether they know it or not. Google bans AGPL dependencies outright.	None	Inherited from Swiss	AGPL common
Commercial license on every plan Build and sell closed source apps, keep your code private, ship to any app store, white label for clients, and pass the license audits that funding rounds and acquisitions run. No source disclosure.	Yes	Varies	Copyleft terms
Stateless calculations, your own user profiles API request bodies are never persisted. Responses derived from submitted data may be cached for up to 24 hours; Cache-Control: no-store bypasses the cache. Usage metadata retention is in /policy/privacy. Your application keeps user profiles and memory.	Yes	Accounts and logs	Self hosted
EU data residency with an Article 28 DPA on every plan Stored data stays in Germany, inside the EU, on every plan and for every customer, so an EU buyer gets EU residency by default instead of paying for a regional tier. The processor contract, EU Standard Contractual Clauses, security measures, dated subprocessor register, and breach notification terms are all published, so procurement can review them without contacting us.	Germany, all plans	Enterprise or on request	Yours to write

18 Domains. One Price.

Starter

Professional

Business

Enterprise