CoinCap
- Free allowance
- Free tier: 500 credits per month at 5 API calls per minute, with no WebSocket access; each call costs 1 credit plus 1 more per 2,500 bytes of response
- Verdict
- caveatusable, with a named limit or an unprobed read path
- Cost
- free tier
- Identity
- emailno card, no phone
- Binding limit
- request-rate5 API calls per minute on the Free tier; 500 credits per month on the Free tier, 1 credit per call plus 1 per 2,500 bytes
- Evidence
- documented10 sources; a first-party page was read and the sentence quoted
- Freshness
- stale on 2026-12-04checked 2026-11-03 (live); stale on 2026-12-04
| Free tier | Free tier: 500 credits per month at 5 API calls per minute, with no WebSocket access; each call costs 1 credit plus 1 more per 2,500 bytes of response unit credits; metered on request-count; Every call needs an API key, also on the Free tier; the old keyless v2 host is not the current API. Responses to identical requests may come from a 60-second cache and are billed like fresh ones. Ten agent-friendly endpoints can instead be paid per call in USDC with no account. Paid tiers start at Builder, 50,000 credits per month at 30 calls per minute. |
|---|---|
| Price | none stated |
| Limits |
Bulk path: none; pages of up to 2,000 rows. Storage terms: not read (unverified: the terms page captured answered HTTP 404). |
| Binding | request-rate 500 credits a month, spent at 1 credit or more per call, run out long before the 5 calls per minute matter. |
| Identity | email A key needs an account made at coincap.io; the vendor says no credit card is required. The fields of the sign-up form were not read, so email as the only identifier is unverified: behind a sign-up. |
| Egress | not metered in bytes, but each 2,500 bytes of a response costs 1 extra credit against the 500-credit monthly allowance free allowance: 500 credits per month |
| Per-object cap | 100 results per page by default, up to 2,000 per page on request |
| Interface | rest GET https://rest.coincap.io/v3/... with Authorization: Bearer KEY or the apiKey query parameter; an MCP endpoint and WebSocket (paid tiers) also exist endpoint: https://rest.coincap.io/v3 |
| Tooling | curl or any HTTP client; an OpenAPI 3.0 spec is published |
| Composes with | Spot prices and history for a few hundred calls a month; CoinPaprika and CoinLore cover the same ground with no key. |
| Reliability | A call with no key answers HTTP 401; the Free tier is capped at 5 calls per minute. |
| Notes | 500 credits a month is the binding quota; the keyless route exists only as paid per-call USDC. Bulk path: none. Storage terms: unverified. |
| Evidence note | documented Tier numbers are read from the vendor docs and pricing page; a keyless call answered 401. The key was not exercised. |
| Parsed numbers |
|
Evidence 10
| date | source | what it proved |
|---|---|---|
| 2026-11-02 | pro.coincap.io/api-docs | the Free tier is 500 credits a month at 5 calls a minute, REST only |
| 2026-11-02 | pro.coincap.io/api-docs | Free tier credits per month and no WebSocket |
| 2026-11-02 | pro.coincap.io/api-docs | credit cost per call |
| 2026-11-02 | pro.coincap.io/api-docs | every call needs a bearer token |
| 2026-11-02 | pro.coincap.io/api-docs | a response may be served from a 60-second cache and is billed the same |
| 2026-11-02 | pro.coincap.io/api-docs | page size is 100 by default and up to 2,000 |
| 2026-11-02 | splash.coincap.io/pricing | the Free plan needs no card and does not expire |
| 2026-11-02 | splash.coincap.io/ | history reaches back to July 2010 |
| 2026-11-02 | splash.coincap.io/ | ten endpoints accept pay-per-call USDC with no account |
| 2026-11-03 | probe: https://rest.coincap.io/v3/price/bysymbol/BTC | part of the text of Reliability, above |
More fields 2
| bulk path | none; pages of up to 2,000 rows |
|---|---|
| history depth | back to July 2010 for Bitcoin; varies by asset |
Unknown values 1
- retention stated: the field does not apply to this kind of offer