Indices
Providers using this tag (29)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 2 Complete, well-documented, and agent-ready
Developing 12 Usable, with meaningful gaps to close
Thin 9 Limited public surface area
Emerging 2 Early or largely undocumented
APIs with this tag (24)
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 →
Exemplar 1 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Bloomberg Market Data APIProvides real-time and historical market data, including stock prices, indices, commodities, and currencies.Kaiko IndicesRegulated benchmark crypto indices designed for fund administrators and ETF/ETP issuers.Kaiko Indices APIIndex composition and replication data.Amazon Q Indices APIThe Indices API from Amazon Q — 1 operation(s) for indices.
Developing 11 Usable, with meaningful gaps to close
J-Quants Indices APIDaily OHLC for TOPIX and other JPX indices under /v2/indices/* endpoints, with plan-gated access (TOPIX fro...Cboe Delayed Quotes APIPublic, unauthenticated JSON endpoints served from cdn.cboe.com that back the delayed-quote pages on cboe.c...EOD Historical Data Indices APIS&P/Dow Jones indices data and componentsAmazon IoT Device Defender Indices APIThe Indices API from Amazon IoT Device Defender — 7 operation(s) for indices.Amazon IoT Core Indices APIThe Indices API from Amazon IoT Core — 7 operation(s) for indices.Amazon IoT Device Management Indices APIThe Indices API from Amazon IoT Device Management — 7 operation(s) for indices.Forum Indices APIAttention index values and historyTMX Data Science API V2 (Insight API)Second-generation GET-based REST surface on insightapi.tmxanalytics.com/v2 covering broker analytics, issue...VTEX Indices APIThe Indices API from VTEX — 2 operation(s) for indices.Xignite Global Indices APIStock market index and benchmark values with chart bars and index metadata from the globalindices.xignite.c...Pixxel Indices APIThe Indices API from Pixxel — 1 operation(s) for indices.
Thin 7 Limited public surface area
Planet Processing APIRun custom processing scripts on raw bands and derive indices (NDVI, EVI, etc.) over Planet imagery without...Elastic Indices APIManage indices, mappings, and settings.Polygon.io Indices APIReal-time and historical index values for major US and global indices via REST and WebSocket.Goldman Sachs Index Services APIThe Index Services API provides access to the full range of Goldman Sachs indices, systematic trading strat...J-Quants Indices APIThe Indices API from J-Quants — 1 operation(s) for indices.Euronext Web Services Indices APIIndex-level data for Euronext indices delivered through the Euronext Web Services JSON API, documented in a...EDI Index Constitution APIIndex constituent reference data via the GetReferenceNameForIndexConstituents endpoint.
Emerging 1 Early or largely undocumented
Score breakdown
Frequency
47.1
log-scaled weighted occurrences
Breadth
0.8
spread across providers
Quality lift
53.6
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor
Related tags
Stocks 13 co-occurrences
Equities 6 co-occurrences
Forex 6 co-occurrences
Corporate Actions 5 co-occurrences
Options 11 co-occurrences
Futures 7 co-occurrences
Derivatives 8 co-occurrences
Historical Data 7 co-occurrences
Where this tag comes from
Api tag24
Provider tag11
Openapi tag13
Openapi op tag39
Cohort brief
Auto-generatedThe 29 providers in the APIs.io catalog tagged Indices, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
29
all scored
Mean Kin Score
43.8
+23.1 vs catalog 20.7
Mean Agent Readiness
24.4
+14.7 vs catalog 9.7
Spread
16.7–71.5
median 42 · σ 13.6
How the 29 split by band
Exemplar 2Strong 4Developing 12Thin 9Emerging 2Minimal 0
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 46.8 | 17.9 | +28.9 | 29 |
| Contract Quality | 44.2 | 17.5 | +26.7 | 29 |
| Access Clarity | 45 | 22.3 | +22.7 | 29 |
| Operational Transparency | 30.3 | 11.3 | +19 | 29 |
| Contract Governance | 17.7 | 6.4 | +11.3 | 29 |
| Discoverability | 70.7 | 60.4 | +10.3 | 29 |
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) | 38% | 16% | +22 |
| MCP server (first-party) | 14% | 7% | +7 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 10% | 9% | +1 |
| Security | 97% | 88% | +9 |
| Arazzo workflows | 7% | 2% | +5 |
| Governance rules | 45% | 13% | +32 |
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 Polygon 71.5
- 2 Market Data 67.6
- 3 ThetaData 65.2
- 4 Bloomberg 63.8
- 5 Kaiko 57.5
- 6 Amazon Q 56
- 7 JPX (Japan Exchange Group) 53.4
- 8 Cboe Global Markets 51.4
- 9 EOD Historical Data 50.7
- 10 Amazon IoT Device Defender 49.7
Top by Agent Readiness
- 1 Polygon 57.3
- 2 Forum 39.1
- 3 EOD Historical Data 35.4
- 4 Bloomberg 35.1
- 5 Finage 32.3
- 6 ThetaData 32.3
- 7 VTEX 32.3
- 8 Amazon IoT Core 29.8
- 9 Amazon IoT Device Defender 29.8
- 10 Amazon IoT Device Management 29.8
All 29 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
Every tag here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for tags
7 MCP tools reach this
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/indices"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/indices"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/indices/stats" \
-H "X-API-Key: $APIS_IO_KEY"Discovery needs no key. Ratings and market analysis are Pro.