# BMLL Technologies

**Canonical:** https://apis.io/providers/bmll-technologies/  
**Website:** https://bmlltech.com/  
**APIs profiled:** 4

BMLL is a London-based provider of harmonised historical Level 3, 2, and 1 order book data and analytics for capital markets, covering global equities, ETFs, futures, and options. Acquired by Nordic Capital in October 2025 (with Optiver as minority shareholder), BMLL sells its data through the BMLL Data Lab hosted Python environment, the BMLL Data Feed file product, and entitlement-gated REST APIs (Reference Data, Time-Series, Market Data, and an async query APIv2) documented publicly via the bmll Python SDK on PyPI, with delivery over API, S3, SFTP, and Snowflake. There is no self-serve signup - access is sales-led with key-pair credentials issued per account.

## Kin Score — 31.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.2).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 52.4 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

Regulatory layer — **Securities & Market Data**: 50.0 (matched via tags).

## Agent readiness — 12.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (4)

- **BMLL Reference Data API** — Query reference data for the instruments, listings, and markets in the BMLL universe (equities, ETFs, futures, options), including availability by data type (LOB, listing/instru...
- **BMLL Time-Series API** — Daily time-series metrics and analytics derived from BMLL's harmonised Level 3 order book history, including classified trades, queried by instrument, listing, or market. Docume...
- **BMLL Market Data API** — Retrieve per-instrument market state and consolidated best bid and offer (CBBO) for listings on a given day, with an async poll-for-result request pattern. Documented publicly t...
- **BMLL APIv2 Query API** — Asynchronous dataset query API (initiate query, poll, download results as JSONL/Arrow into pandas or polars) over BMLL datasets, including a timeseries query endpoint. An OpenAP...

## Security (2)

- **Bmll Technologies Authentication** — key-pair-jwt/bearer/apiKey · 3 schemes
- **Bmll Technologies Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

Financial, Market Data, Order Book, Stocks, Trading, Reference Data, Historical Data, Analytics, ETFs, Futures, Options

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/bmll-technologies/). Scores are computed from the provider's own public artifacts under a published rubric.