Custody
Business capabilities this tag reaches
Capital Markets Operations Management 1
Providers using this tag (47)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 2 Complete, well-documented, and agent-ready
Strong 6 Solid coverage with minor gaps
Developing 17 Usable, with meaningful gaps to close
Thin 9 Limited public surface area
Emerging 7 Early or largely undocumented
Minimal 6 Almost no public developer surface
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 3 Solid coverage with minor gaps
Fireblocks Transactions APICreate, cancel, drop, and query digital-asset transactions across all supported chains. Every transaction p...Fireblocks Vaults APICreate and manage vault accounts, asset wallets, deposit addresses, attached tags, and balance inquiries. V...Bullish Custody APIAuthenticated APIs for custody, [Custody Basic Examples](https://github.com/bullish-exchange/api-examples/b...
Developing 7 Usable, with meaningful gaps to close
Settlement Info Reporting APISecurity settlement information reporting from the SIX custody cockpit for the Swiss market, publicly docum...Sygnum Custody APIEndpoint set designed for bank clients to fetch account balances held in Sygnum's institutional-grade digit...Blockdaemon Builder Vault TSMThreshold Signature Scheme (TSM) MPC wallet platform for builders. Customizable, deployable on-premises or ...Blockdaemon Institutional VaultSelf-hosted MPC wallet for institutional hot, warm, and cold storage with granular governance, transaction ...WealthKernel APIAll-in-one REST API for digital investing: onboarding, accounts (GIA/ISA/JISA/SIPP), funding, custody, trad...Clearstream Xact via SWIFTXact via SWIFT delivers settlement, custody, asset servicing and reporting messages over the SWIFTNet FIN n...Clearstream Xact Web PortalXact Web Portal is the browser-based interface to ClearstreamXact for instructing settlement, custody and c...
Thin 6 Limited public surface area
Banco B3 APIsBanco B3 Custody API for operation billing, position reports, and fund quote validation, plus the Settlemen...Goldman Sachs RIA Custody APIThe Goldman Sachs Custody Solutions (GSCS) RIA Custody platform exposes REST APIs that let advisor firms an...NOWPayments Custody APIFund custody management API enabling limitless off-chain operations, sub-account creation, and controlled f...Taurus-PROTECT & Taurus-CAPITAL APIREST API for institutional custody (Taurus-PROTECT) and tokenization / digital asset issuance (Taurus-CAPIT...Open Trust APIsFirst Digital's RESTful API suite for programmatic access to its trust and custody data and services. The p...Bastion APIBastion's REST API for regulated stablecoin infrastructure: create and manage custodial wallets, issue and ...
Emerging 7 Early or largely undocumented
Northern Trust Custody APIThe Custody API in the Northern Trust API Store gives institutional clients programmatic access to global c...BNY Asset Servicing APIAsset Servicing API family for custody, fund accounting, middle-office, and transfer-agency operations, pub...Account Valuations APIAccount valuations product supporting custody and institutional portfolio reporting. Reference gated behind...Custody End of Day APIWilmington Trust custody end-of-day product for institutional clients, listed in the portal's Custody API g...Fund Accounting APIFund valuation and accounting product (transfer-agency / fund-administration services) in the Custody API g...Position Exposure APIPosition exposure product for institutional custody/portfolio clients. Reference gated behind portal authen...UBS Partner / KeyPort APIUBS Partner and KeyPort form the enterprise integration surface used by partner banks, external asset manag...
Companies reaching this through an API (6)
These companies publish an API, specification or operation carrying “Custody” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Score breakdown
Frequency
50.3
log-scaled weighted occurrences
Breadth
1.2
spread across providers
Quality lift
44.6
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor
Related tags
Institutional 13 co-occurrences
Digital Assets 25 co-occurrences
Staking 15 co-occurrences
FIX 5 co-occurrences
Settlement 9 co-occurrences
Tokenization 10 co-occurrences
Transfers 9 co-occurrences
Where this tag comes from
Provider tag47
Api tag25
Cohort brief
Auto-generatedThe 47 providers in the APIs.io catalog tagged Custody, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
47
all scored
Mean Kin Score
36.3
+13.4 vs catalog 22.9
Mean Agent Readiness
22.1
+10.2 vs catalog 11.9
Spread
0–68
median 43.2 · σ 18.9
How the 47 split by band
Exemplar 2Strong 5Developing 18Thin 9Emerging 7Minimal 6
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 41.4 | 23.2 | +18.2 | 47 |
| Operational Transparency | 29.7 | 13.7 | +16 | 47 |
| Contract Quality | 30.6 | 17.6 | +13 | 47 |
| Access Clarity | 36.2 | 26.5 | +9.7 | 47 |
| Discoverability | 65.4 | 58.1 | +7.3 | 47 |
| Contract Governance | 11.8 | 6.3 | +5.5 | 47 |
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) | 17% | 14% | +3 |
| MCP server (first-party) | 19% | 12% | +7 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 26% | 11% | +15 |
| Security | 100% | 98% | +2 |
| Arazzo workflows | 4% | 2% | +2 |
| Governance rules | 13% | 14% | -1 |
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 Kraken 68
- 2 Gemini Trust Company 67.5
- 3 Fireblocks 64.5
- 4 Bullish 60.8
- 5 Citi 57.5
- 6 Brale 56.2
- 7 Ripple Labs 55.6
- 8 Zero Hash 54.2
- 9 Fordefi 53.3
- 10 Utila 52.9
Top by Agent Readiness
- 1 Citi 52.3
- 2 Ripple Labs 51.8
- 3 Brale 51.6
- 4 Gemini Trust Company 50.1
- 5 Anchorage Digital 47.5
- 6 Paxos 46.5
- 7 tZERO 44.4
- 8 AltoIRA 42.6
- 9 Figment 41.8
- 10 Bakkt 39
All 47 members of this roster resolve to a scored provider in
the catalog.
Coverage caveat. 42 of 47 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 5 October 2026, across 29093 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.
Coverage caveat. 42 of 47 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 5 October 2026, across 29093 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.