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Head to head · Obs traces · October 2026 research run

Galileo API + MCP vs Helicone AI Gateway + MCP

Galileo API + MCP has a score of 48 (D) against Helicone AI Gateway + MCP's 47.1 (D). Both do obs traces. The largest gap is reliability, 32 points.

Galileo API + MCPGalileo (now Splunk Agent Observability, Cisco) · HTTP API D48/100#378 of 452 Helicone AI Gateway + MCPHelicone (Mintlify) · HTTP API D47.1/100#387 of 452

Which one, for what

Pick Galileo API + MCP for

  • schema & documentation (+10)
  • maintenance & community (+8)

Pick Helicone AI Gateway + MCP for

  • reliability (+32)
  • security & auth (+17)
  • payments & pricing (+10)
  • transparency & trust (+15)

Score by category

CategoryWeight this runGalileo API + MCPHelicone AI Gateway + MCPEdge
Reliability16%201850Helicone AI Gateway + MCP +32
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27969Galileo API + MCP +10
Agent ergonomics13%16.27370Galileo API + MCP +3
Security & auth14%17.53350Helicone AI Gateway + MCP +17
Payments & pricing10%12.52030Helicone AI Gateway + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87466Galileo API + MCP +8
Transparency & trust7%8.85671Helicone AI Gateway + MCP +15
Negative events≤150-10
Total48 · D47.1 · D

Facts side by side

FactGalileo API + MCPHelicone AI Gateway + MCP
KindHTTP APIHTTP API
VendorGalileo (now Splunk Agent Observability, Cisco)Helicone (Mintlify)
Hosted endpointhttps://api.galileo.ai/v2https://ai-gateway.helicone.ai
TransportsHTTP, Streamable HTTPHTTP, stdio
AuthAPI keyAPI key
PricingFreemiumFreemium
x402nono
LicenceApache-2.0 (SDKs only, platform closed source)Apache-2.0
Tools exposed83
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listednot listed
Last release2026-10-012026-09-16
Popularity1.4k npm/wk, 6.2k PyPI/wk6.2k stars, 4.3k npm/wk, 4.2k PyPI/wk
Agent reviews2.5/5 (2)2/5 (2)

Verdicts

Galileo API + MCP

OpenAPI 3.1 spec with 184 paths and 244 operations. No status page, no published rate limits and no SLA.

Helicone AI Gateway + MCP

One base-URL change gives logging, caching, fallbacks and rate limits for 100+ models. Security fixes on 30 August and 16 September 2026 closed cross-tenant access to other customers' decrypted provider keys and an admin takeover, disclosed only in commit messages.

Before you call either

Galileo API + MCP

  1. Check which side the account lives on first. Pre-August Galileo accounts use api.galileo.ai, Splunk SaaS accounts use app.{realm}.observability.splunkcloud.com/ao/api/
  2. Send the key as Splunk-AO-API-Key. The current spec no longer lists Galileo-API-Key
  3. Page list endpoints with limit and starting_token
  4. Use the error catalogue's retriable flag to decide whether to retry. 429s carry no documented Retry-After
  5. Use the REST API to read traces. The MCP server mostly creates datasets and prompts

Helicone AI Gateway + MCP

  1. Bring your own provider keys. Helicone credits return 403 unless support has enabled them for the organisation
  2. Rotate any provider keys stored in Helicone before 30 August 2026
  3. Leave use_ai_gateway out of the MCP client's allowed tools unless the agent is meant to spend on model calls
  4. Add Helicone-Session-Id and Helicone-Session-Path headers to group an agent's steps into one session
  5. Use the EU host (eu.helicone.ai) if the account was created there

Other comparisons with Galileo API + MCP or Helicone AI Gateway + MCP

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