Is Keryx right for you?

A good fit for

Fits public research questions whose users can inspect cited evidence, understand limited source coverage and distinguish source budgets from total fees.

Before you choose

Observed Quick package0.05USDC service+0.05creator cap=0.1total; payment challenge authoritative, notUSD0.05 total. Fixed nonrefundable; unused creator reserve retained, best-effort target without refund/service credit. Manual thirty-day plan0.36USDC/four Deep requests: failures/pending use slots, unused expire, no auto-renew/unlimited. Paid route considers registered content/free feeds, not whole web; only two listed sources loaded in review. Trial/public jobs may enter public archive; job/recovery file grants access. Private jobs restricted to payer but vendor/AI process questions, not E2E. No research request, wallet, payment or upload performed.

Workflow and handoff

Inspect registered-source previews and source coverage, use only public questions for sponsored reports, verify total service/creator charges and privacy mode, then check citations and settlement evidence before relying on the answer.

Pricing and practical limits

Observed Quick package0.05USDC service+0.05creator cap=0.1total; payment challenge authoritative, notUSD0.05 total. Fixed nonrefundable; unused creator reserve retained, best-effort target without refund/service credit. Manual thirty-day plan0.36USDC/four Deep requests: failures/pending use slots, unused expire, no auto-renew/unlimited. Paid route considers registered content/free feeds, not whole web; only two listed sources loaded in review. Trial/public jobs may enter public archive; job/recovery file grants access. Private jobs restricted to payer but vendor/AI process questions, not E2E. No research request, wallet, payment or upload performed.

Review method

Relevant official-source evidence reviewed individually on 2026-10-09 UTC (October 10 in India). Selected product artwork inspected visually. No hands-on vendor application test was performed. Performance, security and plan enforcement were not independently tested.

What it can do

Features & capabilities

Unknown is different from unavailable. Each fact carries its own evidence.

Capability	Value	Evidence	Checked
Documented workflow	Keryx researches questions with cited sources and exposes source-selection and creator-payment evidence, with public sponsored trials and separately priced paid research.	Facts sourced	2026-10-09

Understand the total cost

Keryx pricing & plans

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The practical questions

Frequently asked questions

Was this product hands-on tested?

No. The listing uses dated official-source evidence and visual artwork review. Unconfirmed pricing, allowances and integrations are stated explicitly.

What is Keryx used for?

Keryx researches questions with cited sources and exposes source-selection and creator-payment evidence, with public sponsored trials and separately priced paid research.

Does Keryx have a free plan?

Sponsored trial needs no wallet/deposit but admission and usage/spending caps apply; numeric free question allowance unconfirmed. Trial reports have public links; free paper metadata is distinct from free synthesis.. This record does not confirm an ongoing free plan.

How much does Keryx cost?

Sponsored trial; caps unconfirmed. See the billing terms below. See the plan cards for entitlements, billing commitments and seat minimums.

Can I use Keryx through an API?

Paid research API, remote MCP and agent/CLI requests documented. Arc USDC funded wallet for paid jobs; no wallet connected, signature supplied or payment performed.. API access and subscription access may have different terms; consult the linked sources.

What should I check before choosing it?

Observed Quick package0.05USDC service+0.05creator cap=0.1total; payment challenge authoritative, notUSD0.05 total. Fixed nonrefundable; unused creator reserve retained, best-effort target without refund/service credit. Manual thirty-day plan0.36USDC/four Deep requests: failures/pending use slots, unused expire, no auto-renew/unlimited. Paid route considers registered content/free feeds, not whole web; only two listed sources loaded in review. Trial/public jobs may enter public archive; job/recovery file grants access. Private jobs restricted to payer but vendor/AI process questions, not E2E. No research request, wallet, payment or upload performed.

Price history

No retained pricing changes yet. A current price alone does not establish a historical trend.

How this profile is supported

Official product information

Product identity and relevant official-source evidence reviewed individually.

Read original source ↗

2026-10-09

Costs and constraints

Observed Quick package0.05USDC service+0.05creator cap=0.1total; payment challenge authoritative, notUSD0.05 total. Fixed nonrefundable; unused creator reserve retained, best-effort target without refund/service credit. Manual thirty-day plan0.36USDC/four Deep requests: failures/pending use slots, unused expire, no auto-renew/unlimited. Paid route considers registered content/free feeds, not whole web; only two listed sources loaded in review. Trial/public jobs may enter public archive; job/recovery file grants access. Private jobs restricted to payer but vendor/AI process questions, not E2E. No research request, wallet, payment or upload performed.

Read original source ↗

2026-10-09

Public trial reports

Trial reports have public links. Use questions you can share publicly.

Read original source ↗

2026-10-09

Non-refundable package

Fixed-price and non-refundable. Unused creator reserve stays in the package.

Read original source ↗

2026-10-09

Manual monthly plan

Four Deep research requests over 30 days for 0.36 USDC, compared with 0.4 USDC separately.