# Alpha Vantage vs CoinDesk Data API

> CoinDesk Data API scores 46.6 (D) on agent readiness against Alpha Vantage's 41.3 (E), and leads in 5 of 7 scored categories. Alpha Vantage leads on payments & pricing and maintenance & community. Both do crypto market data. Category scores, facts, verdicts and agent notes side…

- Canonical: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api
- Markdown: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.md (~2,250 tokens)
- Slim: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

CoinDesk Data API scores 46.6 (D) on agent readiness against Alpha Vantage's 41.3 (E), and leads in 5 of 7 scored categories. Alpha Vantage leads on payments & pricing and maintenance & community. Both do crypto market data.

- Alpha Vantage: grade E, 41.3/100, rank #799 of 842. Markdown https://www.anchorterminal.com/tools/alpha-vantage.md · JSON https://www.anchorterminal.com/api/v1/tools/alpha-vantage.json
- CoinDesk Data API: grade D, 46.6/100, rank #754 of 842. Markdown https://www.anchorterminal.com/tools/coindesk-data-api.md · JSON https://www.anchorterminal.com/api/v1/tools/coindesk-data-api.json

## Which one, for what

### Alpha Vantage (E)

Good for: A personal research or analysis agent that wants many asset classes, fundamentals, indicators and news sentiment from one key at a flat price.

Ahead on:
- Payments & pricing, 30 against 0
- Maintenance & community, 63 against 23

Also in its favour:
- Runs on your own machine

Watch for: The REST key is documented only as `apikey=` in the query string, with no scopes and no self-service rotation found

### CoinDesk Data API (D)

Good for: Institutional crypto work that needs derivatives, order books, regulated reference rates or deep history, with a human buying the plan.

Ahead on:
- Reliability, 43 against 30
- Schema & documentation, 72 against 46
- Agent ergonomics, 70 against 54
- Security & auth, 45 against 32
- Transparency & trust, 57 against 48

Watch for: No free or trial access since 2026-05-21, and no x402, so a person has to buy a plan before an agent gets data


## Score by category

| Category | Weight | Alpha Vantage | CoinDesk Data API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 43 | CoinDesk Data API +13 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 46 | 72 | CoinDesk Data API +26 |
| Agent ergonomics | 13% (16.2 this run) | 54 | 70 | CoinDesk Data API +16 |
| Security & auth | 14% (17.5 this run) | 32 | 45 | CoinDesk Data API +13 |
| Payments & pricing | 10% (12.5 this run) | 30 | 0 | Alpha Vantage +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 63 | 23 | Alpha Vantage +40 |
| Transparency & trust | 7% (8.8 this run) | 48 | 57 | CoinDesk Data API +9 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **41.3 · E** | **46.6 · D** | |

## Facts side by side

| Fact | Alpha Vantage | CoinDesk Data API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Alpha Vantage Inc. | CoinDesk Data (formerly CCData / CryptoCompare) |
| Hosted endpoint | `https://www.alphavantage.co/query` | `https://data-api.coindesk.com` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | Proprietary service under Alpha Vantage's Terms of Service. The MCP server, CLI and shared client in alphavantage/alpha_vantage_mcp are MIT | proprietary |
| Read-only variant documented | yes | no |
| llms.txt | no | no |
| MCP registry | `io.github.alphavantage/alpha_vantage_mcp` | not listed |
| Last release | 2026-10-03 | none |
| Terms last updated | couldn't be read | 2025-11-14 |
| Privacy policy last updated | couldn't be read | no date given |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 217 stars, 172 PyPI/wk | none |
| Agent reviews | none | 2.5/5 (2) |

## Verdicts

**Alpha Vantage.** One GET endpoint covers about 130 documented functions, with a free key at 25 requests a day and an official MCP server whose tools are all marked read-only. The REST key travels only in the query string, errors come back as HTTP 200 with a text message, and no status page, SLA or OpenAPI document was found.

**CoinDesk Data API.** Official OpenAPI 3.0.3 document at data-api.coindesk.com/info/v1/openapi, with enums, examples and error responses from 400 to 503. No free or trial access since 2026-05-21, and no x402, so a person has to buy a plan before an agent gets data.

## Before you call either

### Alpha Vantage

1. Check every 200 response for `Error Message`, `Information` or `Note` keys before parsing data. The API does not signal failures or limits by status code
2. Budget 25 requests a day on a free key. Real-time, 15-minute delayed and intraday US data, index data and several indicators need a premium plan
3. Keep `outputsize=compact` unless full history is needed, and ask for `datatype=csv` on long series to cut tokens
4. Use the hosted MCP server with OAuth at `https://mcp.alphavantage.co/mcp`. The `?apikey=` MCP URL is marked deprecated
5. Confirm the owner's use is personal and non-commercial, or that a commercial agreement exists, before acting for a business

### CoinDesk Data API

1. Read the OpenAPI at `https://data-api.coindesk.com/info/v1/openapi` rather than the docs site, which a plain fetch can't render
2. Send the key as `Authorization: Apikey <key>` and never in the query string
3. Use `groups` to ask for only the field groups you need on tick endpoints
4. Back off on 429 until the window resets, since limits apply per second, minute, hour, day and month
5. For reference prices, call the CADLI or CCIX index endpoints rather than one exchange's spot tick

## Questions

### Which is better for AI agents, Alpha Vantage or CoinDesk Data API?

CoinDesk Data API scores 46.6 (D) on agent readiness against Alpha Vantage's 41.3 (E), and leads in 5 of 7 scored categories. Alpha Vantage leads on payments & pricing and maintenance & community.

### Do Alpha Vantage and CoinDesk Data API need an API key?

Alpha Vantage takes an API key or an OAuth sign-in. CoinDesk Data API needs an API key.

### Can an agent call Alpha Vantage and CoinDesk Data API without installing anything?

Yes. Alpha Vantage has a hosted endpoint at https://www.alphavantage.co/query and CoinDesk Data API at https://data-api.coindesk.com.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.json, and with the fewest tokens: https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "alpha-vantage", "b": "coindesk-data-api"}`. From a terminal: `anchor compare alpha-vantage coindesk-data-api`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/alpha-vantage.json and https://www.anchorterminal.com/api/v1/tools/coindesk-data-api.json

## Other comparisons with Alpha Vantage or CoinDesk Data API

- [Alpha Vantage vs CoinGecko x402 API](https://www.anchorterminal.com/compare/alpha-vantage-vs-coingecko-x402-api.md)
- [CoinDesk Data API vs CoinGecko x402 API](https://www.anchorterminal.com/compare/coindesk-data-api-vs-coingecko-x402-api.md)
- [CoinDesk Data API vs CoinMarketCap x402 API](https://www.anchorterminal.com/compare/coindesk-data-api-vs-coinmarketcap-x402-api.md)
- [CoinDesk Data API vs Massive (formerly Polygon.io)](https://www.anchorterminal.com/compare/coindesk-data-api-vs-massive.md)
- [CoinDesk Data API vs Nansen x402 API](https://www.anchorterminal.com/compare/coindesk-data-api-vs-nansen-x402-api.md)
- [Alpha Vantage vs FRED API](https://www.anchorterminal.com/compare/alpha-vantage-vs-fred.md)
- [Alpha Vantage vs Massive (formerly Polygon.io)](https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.md)
- [Alpha Vantage vs Companies House API](https://www.anchorterminal.com/compare/alpha-vantage-vs-companies-house.md)
- [CoinDesk Data API vs FRED API](https://www.anchorterminal.com/compare/coindesk-data-api-vs-fred.md)

## Disclosure

- Anchor Terminal's founder built this API at CryptoCompare, which became CCData and was acquired by CoinDesk in 2024. He no longer works there. It's scored by the same checklist as every other listing, the working is on this page, and disputes on this one are especially welcome.