Order Book
Variants seen in the corpus:
Order BookOrderbook
Providers using this tag (32)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 3 Solid coverage with minor gaps
Developing 7 Usable, with meaningful gaps to close
Thin 13 Limited public surface area
Emerging 7 Early or largely undocumented
APIs with this tag (26)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Strong 3 Solid coverage with minor gaps
GoldRush Hyperliquid WebSocket APIWebSocket channels for Hyperliquid markets including l2Book (wire-equal to the public feed), l2BookDiff (Go...The San Francisco Compute Company Orderbook APIRead-only orderbook visibility: bid/ask spread, depth, open and filled orders, and historical fills, keyed ...A7 Analytics Platform - Order Book APIConstructed historical order books for the T7 trading venues of Deutsche Börse Group (Eurex, Xetra) with na...
Developing 4 Usable, with meaningful gaps to close
CryptoCompare Order Book APITop-of-book order book data across integrated exchanges.CryptoCompare Streaming WebSocketSingle secure WebSocket endpoint multiplexing every subscription via tilde-delimited subscription strings (...OKX Market Data APIPublic REST and WebSocket endpoints delivering real-time and historical market data including order books, ...B3 Market Data Feed (UMDF)B3's real-time market data distribution over the Unified Market Data Feed (UMDF) - event-based bid, ask, tr...
Thin 13 Limited public surface area
Polymarket CLOB APICentral-limit order book REST API for Polymarket - place, cancel, and query orders, list markets and tokens...Polymarket WebSocketReal-time streaming feed for order book updates, trades, and market events on the Polymarket CLOB - used by...Hyperliquid WebSocket APIReal-time WebSocket feed delivering order-book deltas, trades, candles, BBO, user fills, user funding, user...Bitstamp WebSocket APIReal-time WebSocket API providing live market data streams including order book updates, live trades, ticke...Bithumb WebSocket APIReal-time WebSocket API for streaming market data including tickers, order books, and trade executions, as ...WazirX WebSocket APIEndpoints for WebSocket authentication token generationSynthetix Info APIPublic REST API for accessing Synthetix market data including markets, prices, candles, funding rates, coll...1inch Orderbook APIThe Orderbook API from 1inch — 2 operation(s) for orderbook.1inch Orderbook APILimit-order placement, query, fill, and cancellation endpoints.HKEX Orion Market Data Platform - Securities Market (OMD-C)Real-time datafeeds (OMD-C SS, SP, SF tiers) for all securities traded on the Stock Exchange of Hong Kong, ...BMLL Time-Series APIDaily time-series metrics and analytics derived from BMLL's harmonised Level 3 order book history, includin...Euronext Optiq Market Data Gateway (MDG)Low-latency real-time market data feed for Euronext cash and derivatives markets delivered as UDP multicast...1inch Orderbook APILimit Order Protocol orderbook — create, query, fill, and cancel signed limit orders across supported EVM c...
Emerging 6 Early or largely undocumented
Simudyne Pulse Synthetic Market Data APIREST API and Python SDK for tick-level synthetic market data — L1 quotes, L2 order book depth, trades, and ...Pendle Boros Core Smart ContractsOpen-source Solidity core for Boros — the order-book / margin venue that lets traders long or short yield r...Pendle Real-Time Feeds (Socket.IO)Real-time data feeds delivered over Socket.IO from `https://api-v2.pendle.finance/pendle-v2`. Clients conne...Filament APISignature-authenticated REST + WebSocket order-book API for the Filament perpetual DEX on Sei. Place limit/...EPEX SPOT Continuous Intraday Market Data APIRead-only API subscription (Continuous API Read-only, EUR 3,360.00/month for internal usage) giving real-ti...Mango v4 Orderbook FeedLow-latency WebSocket feed (service-mango-orderbook) that parses Mango V4 Perp and Openbook spot bookside a...
Score breakdown
Frequency
45.1
log-scaled weighted occurrences
Breadth
0.9
spread across providers
Quality lift
41.0
mean composite of providers using it
Cohesion
9.3
strength of nearest seed neighbor
Related tags
Perpetuals 7 co-occurrences
Spot 5 co-occurrences
Exchange 9 co-occurrences
DEX 5 co-occurrences
Derivatives 8 co-occurrences
Trading 23 co-occurrences
Market Data 21 co-occurrences
Futures 5 co-occurrences
Where this tag comes from
Api tag26
Provider tag17
Openapi tag3
Openapi op tag7
Cohort brief
Auto-generatedThe 32 providers in the APIs.io catalog tagged Order Book, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
32
all scored
Mean Kin Score
33.7
+13.0 vs catalog 20.7
Mean Agent Readiness
19.7
+10.0 vs catalog 9.7
Spread
7.8–60.4
median 32.4 · σ 13.8
How the 32 split by band
Exemplar 0Strong 3Developing 7Thin 13Emerging 7Minimal 2
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 37.3 | 17.5 | +19.8 | 32 |
| Developer Ergonomics | 37.2 | 17.9 | +19.3 | 32 |
| Operational Transparency | 25.2 | 11.3 | +13.9 | 32 |
| Discoverability | 72.5 | 60.4 | +12.1 | 32 |
| Access Clarity | 27.3 | 22.3 | +5 | 32 |
| Contract Governance | 11.2 | 6.4 | +4.8 | 32 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 28% | 16% | +12 |
| MCP server (first-party) | 9% | 7% | +2 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 6% | 9% | -3 |
| Security | 97% | 88% | +9 |
| Arazzo workflows | 3% | 2% | +1 |
| Governance rules | 31% | 13% | +18 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 Covalent 60.4
- 2 The San Francisco Compute Company 55.2
- 3 Deutsche Börse 54.4
- 4 CryptoCompare 53.8
- 5 Kuru 51
- 6 Orderly Network 48.1
- 7 Rarible 46.8
- 8 Coin Metrics 45.8
- 9 OKX 44.8
- 10 B3 (Brasil Bolsa Balcão) 43.4
Top by Agent Readiness
- 1 CryptoCompare 60.2
- 2 The San Francisco Compute Company 53.4
- 3 Orderly Network 35
- 4 Kuru 32.4
- 5 Bitstamp 29.6
- 6 Covalent 29.1
- 7 Rarible 28.1
- 8 WazirX 28.1
- 9 Deutsche Börse 27.5
- 10 Synthetix 25.8
All 32 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
25 August 2026, across 26891
providers, using the same computation served by the
APIs.io cohort API. Briefs are published for rosters of
5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
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Tools for tags
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find_tagsBrowse and filter every tag in the catalog.get_cohortThis tag as a scored cohort — every provider carrying it, with scores.cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This tag
curl "https://apis.io/api/v1/tags/order-book"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/order-book"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/order-book/stats" \
-H "X-API-Key: $APIS_IO_KEY"Discovery needs no key. Ratings and market analysis are Pro.