Marsh & McLennan Companies is a global professional services firm offering clients advice and solutions in risk, strategy, and people through Marsh, Guy Carpenter, Mercer, and Oliver Wyman. The firm does not currently publish a public developer portal or self-service APIs; data exchange with clients is conducted through engagement-specific integrations.
Marsh & McLennan is profiled on the APIs.io network. Tagged areas include Fortune 500, Insurance, Risk Management, Consulting, and Professional Services.
Regulatory Posture applies to this provider. Its tags matched the
Insurance regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
aid: marsh-and-mclennan
name: Marsh & McLennan
description: Marsh & McLennan Companies is a global professional services firm offering clients advice and solutions in risk,
strategy, and people through Marsh, Guy Carpenter, Mercer, and Oliver Wyman. The firm does not currently publish a public
developer portal or self-service APIs; data exchange with clients is conducted through engagement-specific integrations.
kind: company
deliveryModel:
model: unknown
open_source: false
commercial: false
callable_host: false
label: Delivery model not determined — needs a product licence on record
confidence: low
source:
- none
generated: '2026-08-28'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source:
- url: https://www.mmc.com
status: 301
note: declared website redirects to https://www.marsh.com/en/home.html — a different registrable domain (mmc.com -> marsh.com),
possible rename or acquisition (probed 2026-09-03, roadmap#169)
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/marsh-and-mclennan.png
url: https://raw.githubusercontent.com/api-evangelist/marsh-and-mclennan/refs/heads/main/apis.yml
tags:
- Fortune 500
- Insurance
- Risk Management
- Consulting
- Professional Services
created: '2026-03-21'
modified: '2026-04-28'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
url: security/marsh-and-mclennan-domain-security.yml
- type: GitHubOrganization
url: https://github.com/MarshMcLennan
- type: Website
url: https://www.mmc.com
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
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